You mean if they took out the romances for ME4's series and or game would I still play it? I'd be more unlikely too they already have me iffy about them so then they remove a part of the game that when done correctly can help the players to feel connected to the world and give them something more personal to protect. Protecting the galaxy is good but I've got a large brush and therefore don't care that much about this wide black space called the galaxy. Saving my home world is great if its actually Earth however if my homeworld is made up place like Astrica that I spent 5 minuites on then no I don't really care about it because there isn't anything to care for. Now my LI the person whom I fight with all game long I care about them and they care about saving the galaxy so I CARE about saving the galaxy. My LI cares about saving their homeworld and I'm little more interested in saving it I won't let their world get destroyed so long as I can do so. My LI more then my crewmembers or squad place a face to the world and make me want to save it. Removing that puts me back in the why should I care? Oh that's right the plot says I do so I guess I'll go para and save everybody.
If they're planning on doing a series they should also keep their LI's consistent no more Kaiden transformations and retcons make new characters that have similar qualities like they could've made up a new soilder ( not Vega) who was that soft spoken sensitive type of man but he'd be gay and unlike Kaiden who likes to go to quiet dinners this quiet man likes to go on roller coasters and takes an interest in shep's hobbies. Ok they can have some simularities but be different no need to retcon. LIs should be defined from the begining and stay that way if you want new option in the series as you go then new people can crop up and be recruitable if the player asks them to come along. There are core characters that are plot based and therefore aren't crew options but other npcs who can be for instance Tali, Liara, Garrus, and Mordin are plot essential their things influence the story present, future, and far future but Miranda, only influence ME2 so in ME3 she's an optional character and can be replaced by players choice in old non critcal characters like Jacob or she can be asked to join, Jack, Thane, and Kasumi's thing never did anything to effect the plot anywhere so these people would be optional additions but say I want to have Thane, John Doe, and Jane Asari instead so I ask them to join.
Miranda, Jack, Thane, Kasumi, Jacob, ect don't just get written off for the trilogy they just get to be options in ME3 but aren't required to the plot like Tali, Garrus, Mordin,and Liara are they still get moments, dialogue wheel one on ones, rare auto dialogue moments, personal issues for hero to solve they just are completely optional I can replace any of them with other npc's in the world who are qualified these of course BW would figure out looks and personalities on but they too would have the same attention given as non critical crewmembers would so they get moments, LI potentials, problems for hero to solve, dialogue wheel moments, rare auto dialogue, ect