I'll comment on yours and add my own.
1. I want a more sophisticated tactics set-up. In Origins and 2, we had a lovely programmable tactics set up that made it easy to set up your NPC companions to do what you wanted them to do. Since I prefer to play real time as opposed to tactical, I'd love to see this return in the next game. I know with the new game engine it might require some fancy programming, but I think it would be worth it. Bioware had the Cadillac of Tactics and they traded it in for a Yugo.
I agree, but they should carry the current trend to the logical conclusion. If the reason they dumbed down the tactical planner from DAO was to "broaden the audience", the next game should have a fully scriptable AI interface for pro gamers as well. In other words, they went to one extreme of the spectrum in DAI, add the other end in DA4. That's maximum audience coverage.
Add Lua or Python or Groovy, or whatever the flavor of the month scripting language is, and an API at least on a par with DAO. Or, provide a proper modding API to add our own tactical planner UI. One way or the other, expose the combat AI knobs and dials and let the community do the rest.
2. I want to be able to use all of my abilities in combat again. Hey guys, IRL, you'd use all the tools in your toolbox to stay alive. You wouldn't go "Oh I can't use static cage because I left that spell at home. Please figure out a way for use to use all our stuff in combat again. Eight spells/abilities just isn't enough.
This I disagree with. Limiting the number of actives actually increases the interest of min/maxing builds. Otherwise, every build is effectively the same after a certain experience level.
Besides, FT mats capture some of the best actives anyway, like Hidden Blades and Shield Bash. They could keep that mechanism and expand it just a little more so that any active worth having on the battlefield can be enchanted onto gear, at some sort of penalty, like only 50% power or whatever. For things that aren't appropriate for on hit, enchant into tonics or grenades. Being a consumable with a limited inventory is enough of a handicap by itself. It would be great to be able to drink a Fade Cloak tonic or throw a Static Cage grenade and not have to burn an active slot for either.
3. I want to be able to switch weapons in combat! Dang it, people carry more than one weapon at a time and they use them. Our characters should have the same privilege. In order to have the right weapon, you have to meta-game if you are playing in real time--that's an immersion breaker. Give me back at least two weapons please.
I'd agree to a limited form of this: a primary and a secondary, with some classes being able to dual wield. So a mage could have a primary fire staff, but if fire resistant reinforcements show up, switch to the secondary ice staff. A warrior could either switch between a sword and an axe, with a shield in the off hand, or dual wield sword and axe.
Other mechanics:
* Each class should have a tree of focus abilities and pick one from that tree. It doesn't have to be a huge tree, three would be fine. And don't count the focus ability against the 8 active slots (assuming there are active slots).
* Priority target lock, regardless of AI setting. Once I set Cass on a target, she should stick on that target until the target is dead or until I explicitly give her a new target. If I'm controlling my IQ and set a target for my IQ, Cass should not switch to my target just because she has "Follow Controlled" set for AI.
* "Don't be an idiot," AI improvement. Oft repeated scenario: IQ is on frontal assault on some boss, Sera is flanking at range, i.e., far away from the IQ. Sera is set to "Follow Controlled." Sera is plinking away at the distant boss's flank, while some add right behind her is chewing her ass off, literally. She completely ignores the nearby threat to slavishly plink away at the distant target set by the IQ. C'mon! If some monster is biting a non-controlled character on the ass, have them defend themselves without me having to "Simon Says". Switching all characters to Follow Self is not the answer, since sometimes we want concentrated fire on a single target.