I am not sure that the superior darkvision is even going to matter in the game, considering ranges on practically everything (except the stupid shove distance) have been nerfed. There isn't much distance viewing either with the camera not having the z axis. I have not yet noticed any difference in combat between playing a Drow or another race with regular Darkvision.
Also without having actual nighttime gameplay, light sensitivity could get completely ridiculous unless they added an item to counter it, and I am of the opinion that we have too many items already. If we had day/night cycle then I wouldn't mind having the sunlight sensitivity, since Drow could do things at night to avoid the issue, much like those without darkvision can carry a light source to avoid theirs.
Large and heavy weapons should probably not be able to be used by certain races, but they did leave out some racial characteristics from what I can find, like Brave and Nimble for halflings. Perhaps it would be fair to just make it a strength requirement or have specific versions of those weapons that those races can use.
There should definitely be more hostility to certain races depending on where and what they are doing (Drow pretty much everywhere, Tieflings in a city and around shops for instance.)
IMO there should be some kind of disguise system for races like drow or gith. It will add unique gameplay and can be interesting for 2nd playthrough
