1. BW advertising fem hero right along with male hero if not in daul screen time at least via mentioning the fact during the trailers, interviews, tweets/FB, and on site, showing their concept art side by side in the same armors in a trailer or during an interview would be nice, at least vocally getting the word out there so weather its a trilogy or a sequel everyone knows you can be her from the first ME4 game onwards.
2. Selectable races and gender for the hero character as: Quarian, Turian, Human at least I wouldn't mind also having Krogan M/F hero too as lets face it a fem Krogan warlord exploding mooks and taking names would be pretty entertaining.
3. Cutomization of hair, facial features, skin tone and scale tone for aliens, and clothing similar to EVE Online how amazing their hair styles and face features can be! also tattoos for Turians and Quarians as they both kind of have those.
4. Glowing eye color options (think TIM but in all colors) the modders can do this why not you BW? That look is awesome when I get to decide it!
5. My hero (including Quarian hero) can have toggle helmet like we did in ME1 but like ME2 and ME3 during cut scenes it will auto come off.
6. No catsuits, navel V-necks, bra strap "shirts", high heels, breathing masks, or mini skirt space suits I'm battling mooks, fighting zero G's, and dealing with hazardous worlds and weapons not putting on a call girl fashion show here make my crew and the hero dress for success at killing things while being protected aka hard suit armor when in battle and comfortable fitted (not tight) casuals that don't get in the way of quickly putting on armor on a seconds notice. If you can't break away from said outfit offenders then place them at the specialty cititidel store so players can buy that as they see fit and keep the real armor at armory shops.
7. Bring back a functioning economy I should be able to buy/sell casual, armor, guns, and materials I mine.
8. MAKO really bring it back like we said balance those thrusters, reloading ammo it faster, and if we have a tech on board the mako gets fixed at twice the speed! Keep it able to run down colossi and not die, keep it scaling impossible cliffs and trenches, keep the tough outter armor, amp up the horse power, and keep the maps 100% explorable just vary how the terrain looks forest, deserts, the beach.
9. No more ass shots or if you're even thinking on it breast shots as "jokes" the only place this even slightly could be exempt from would be the freaking bedroom. I really didn't care that Miranda was "genetically perfect" her asset shots weren't cute or funny they were morronic, unessisary, immature and you just hurt your game by inserting them you know it BW and we definitly know it so not cool.
10. If not more hub worlds at least make them bigger by either letting us free roam them from the first landing or open up parts we can revisit that are large (not small like the sunset strip) and do more to make them feel alive too many static talking maniquin npcs.
11. Make ME4 a sequel set it 2,000 - 50,000 years into the future I personally vote for 50K because it gets max distance from pick your flavor endings and allows for the new world to have forgotten the reapers even if you picked control they just left to conqur new galaxies or the new enemy of 4 or heck para shep just killed them all.
12. Bring back the 3 - 5 branch convo wheel you don't have to make it para, neutral, ren just make it reactions not tied to the orange/blue morality because these can be ways of reacting as in common sense/nice/socially polite (practical to the situation at hand friendly, greater good, selfless placing others needs before your own), reationary (can be emotions like awkardness, cluelessness, defensive, aggressive, passive), and Amoral (cold, shurgging things off, gets dialouge that is centered soly on the heros needs or wants/selfish, greedy) It's how the dialouge is said (if its the same line) or what dialouge is being said .
13. When dealing with LI potnetials who confesses their fondness for you the left side of the wheel now gain an extra branch the 5th investigate if needed will be there to just keep talking and ignore the fact this person is an LI or wants to be with you (ignore them 4 times and they'll stop pressuing you) and a new 6th bracet shows saying reciprocate clicking this option like the 5th branch opens up a new wheel allowing for 3 - 4 options (the 5th branch is go back) options 3 -4 allow for flirt, play coy, respond in kind, or let down this let down depends on who is coming on to the hero an agressive LI will get an agressive let down, a normal pressuing LI will get a polite let down like I don't like you like that, flilrty LI will get a I'm not into you so knock it off type of let down.
14. Lore consistancy really BW don't go firing your writers game to game keep a lore book with all of it easily spelled out so writers can double check their work no more holo giving beacons or biotic shields that lore says can't stop death in space magically being able to do so yet they aren't in this magical lore defying bubble at all.
15. Actually make major and minor chioces mean crap this time it doesn't have to show in say 5 seconds after you did something but within the same game could be nice just make sure that players can actually draw that line from choice to consequenc without having to grasp at straws or twist lore in order to make that consequence work out. Like if I don't save an npc I shouldn't suddently have my house blown up by my XO there needs to be a link between my XO that npc and ample motive for them to want to blow up my house. If you can't write that out as a police report with means, motives, and opertunity to do the crime then don't do this subplot.
16. Write out all the games you want to produce now for ME4's line up if its only two right them both if you plan a trilogy then write them all now so you don't run into the issues you came up with ME2 vaugley connecting to ME but ME3 was the actual sequal to ME. ME2 mattered so little in the main arc, was a huge departure from the mood and atmosphere of the origional, and was such a waste of time that you are exactly where you started at the begining with nothing on the reapers and if it was axed from the series you only missed 1% relevent content.