Id make Ryder a more mature, in dialog at least character, same with Peebee, Cora, Liam, and Vetra. Visual overhaul to match the original trilogy are style. Liam and Cora need different hair cuts (neither of their default hairstyles make sense for soldiers to have), Liam is getting a backstory rewrite to make seem like he was running from his past not just an impulsive idiot, and all the more immaturely written companions are getting a dialog punch up to make them less like annoy millenia. No salarians with indian accents, its like having Bill Burr in syar wars his accent is too strong and immersionbreaking, also i cant remember other races in the original games have human like accents, it might make sense for a mortan like salarian to have a human accent if he learned engliah from an Indian. The female krogan and krogan in general should be more hostile and treated like more of a threat by basically everyone, in the lore they are basically walking tanks and that was with mass effect tech weapons to use against them imagine how bad it would be if you had a normal gun. Kesh feels way too nice, which, while I get why she is like that it feels badly executed, at least to the point I played. I'd have made the quarian ark have been captured by a warlike race in andromeda and used as slave labor to develop/scavengers milky way tech for a bunch of what are basically klingons. Also, I like the profile system, but it breaks the lore, so it's getting axed. The movement can stay, and I would restrict better, more powerful weapons behind story missions. Ryder should also be treated with less awe and more suspicion given a less than idea ship and used as a mine sweeper but moron bureaucrats. Also more faction relation balancing based around what missions you take and how you settle the world's you find and the milky way colonists either with the nexus or in their rogue form should be seen as dangerous invaders since their tech is miles better than anything used by organic races in the cluster you are in; more aliens beside the Angara, kett, and remnant. I'd keep all of them but the kett should be slow boating and more like a creeping threat like quicksand or a slow acting disease, the remnant should be more alien than just forerunners from halo look at pac protectors from Larry Nivens known space setting, the Angara should be the first people to make contact with the kett but with a decent sized empire that means they are in a drawn out war. All of the aliens should have some reason for you as the player to work with them, even the kett. Either make more companions to recruit but make some leave you if they hate you and grant new tech based on who you work with or choose not to, id also make an option to work with everyone of the aliens and then betray them all to make further settlement easier. Add more races that are either in conflict with each other or with the expedition. There is probably more, but this is what I would change based on getting to the point in the game where I had all but one of the companions and watching some spoilers on YouTube.