10. Playing As Other Species
The original Mass Effect trilogy was very human-centred - Shepard is the first human Spectre, the Collectors attack human colonies as a major plot point in Mass Effect 2, and Cerberus, a major antagonistic force, clearly states that they do what they do "For the benefit of humans only". Even though there are non-human squad members on the team, we never really get to explore the in-game universe from anything other than our own viewpoint. Yes, the online features in ME3 let you play as Asari and Krogan and even Batarian - but that only gives players a look into how the combat might look if you could play as other species. It doesn't show players what actively travelling the rich in-game universe would be like as one of those races. For example, how a Krogan would react with more hostility than usual if you were playing as a Salarian or how the Asari would look down on you should you be an Asari pureblood. Not only that, but it opens up the possibility of different missions appearing for different races, because of the politics involved. The Elder Scrolls series does this kind of thing very well - even just the odd passing mention of your chosen race adds immeasurably to your immersion - and as a consequence, the game feels more alive. If Andromeda wants to expand on the already impressive Mass Effect lore further, then adding in the option to customise your player's race would go a long way to achieving that goal.