What's a list of things you would like to see in ME4? Here's mine:
1. More Lore Porn: I remember the first time I read how a mass effect field enables ships to go FTL, warp space time, and how the ship looks like to the outside observer at FTL speeds, and how mass accelerator weapons and mass effect armor functioned. I remember reading about the Faraxen treaty, the Terra Nova party, and other socio-political issues. I remember being amazed at how every single planet I explored had their own unique codex entry with interesting features (the huge trench caused by mass accelerator fire, the leviathan of dis, etc, etc). I remember reading about the goddamn governmental structure of the Quarian flotilla and how holograms and translators work for f*cks sake. The Codex is the best part of all of the Mass Effect games, bar none. It's what makes the series the cream of the crop when it comes to immersive science fiction universes, putting it on par with all time greats like Deus Ex. I can't wait for the next series to take the technology and lore even further than before.
2. No Renegade/Paragon: In my wishlist for Fallout 4, I mentioned that one of my top desires was the elimination of the Karma system. The same goes here, for the same reasons. Mass Effect is a franchise that, in terms of story telling quality and immersive ability, is far beyond the rather elementary need to mark good or bad choices as such for the player (and yes, that means eliminating the colors of the dialogue options on the left side of the wheel). I realize that paragon and renegade don't necessarily conform to "good" and "bad" as much as "uncompromising morality" and "the ends justify the means" mentality, but the fact remains that labeling choices as such breaks the immersion by reminding you that you're playing a video game, and it simplifies decisions that could be ethically challenging. For example, the instance in Mass Effect 3, on Rannoch, siding with the Quarians is actually the renegade option, whereas siding with the Geth is the paragon option, and compromising between the two is the... more paragon option? It might be me, but I hate it when games destroy a good ethical conundrum by literally telling you what the right or wrong choice is. Which is a nice segue to my next point...
3. Harder choices: Mass Effect seems to be a universe full of almost hard choices. Choices that verge on being truly ethically challenging and thematically profound, but stop just short of that. Sometimes it's due to the (IMO antiquated) Renegade/Paragon system, or offering an easy third way out. It doesn't seem that hard to take the extra step and carry the choices you face in Mass Effect to new heights, but whether Bioware thinks that fans can't handle any more thematic complexity, or whatever the reason is, there's always caveats to make the choices easier. For example, take the Enders-Game-like Thorian queen in ME1, dealing with hard questions like accountability, compassion, the sins of the father vs the son, etc. Very compelling stuff. But there's a copout. If you choose the paragon option, the Thorian Queen just takes her shit somewhere else and promises not be a bother ever again. This takes some of the weight out of the decision and makes the paragon choice more obviously the right one to pick. It would be a far harder (and more realistic) choice if the Thorians had to reintegrate themselves into galactic society and become a resource drain on the other civilizations. There other examples of what could have been great choices falling just a wee bit short, e.g. Legion's loyalty mission in ME2, the ending to ME3 (lets be honest here, if you didn't choose Destroy you're either an idiot or don't understand the game, the developers even wanted you to choose destroy because it's the only one with the Shepard lives ending).
4. Flight Control/Ship customization: I'm not trying to turn Mass Effect into Space Commander, but I want to be able to fly whatever ship is going to be in the new game, and I want to be able to customize it so it feels like my own.
5. No character classes: An organic skill progression tree like Skyrim or Wolfenstein is a far more fun progression than being limited to classes.
Bad Ideas I've heard from other wishlists that Mass Effect should absolutely NOT do:
1. Choose your own race: No no no no no no no no. The games would be far too different to plausibly do this concept right. Mass Effect has too rich a background to do this, and race is sort of a big deal in the Mass Effect Universe. This could only lead to one option-- an option where the three races wouldn't be that different at all, and it would cheapen the lore and disappoint fans as a result.
2. Versus multiplayer: When ME3's multiplayer came out and surprised everyone by actually being good, I thought they would later ruin it by adding a PvP mode. I'm glad they didn't. Tech/biotic/soldier powers would almost impossible to balance (imagine being spammed by stasis or charge or something, that would get old FAST) and without that it would just become a rather dull copycat of people who do it better like GoW. They struck gold with the co op mode, expand on that instead.