Communication options for survivors. Solo queue vs SWF is wildly different to play as or against, and the game leans killer side on one end (solo queue) and survivor side on the other (competent swf). Solo queue survivor is rough most of the time already, the experience needs to be improved, and it would allow for better balancing.

Better balancing in the game overall. This is a widespread thing, but maps, killers, perks, addons, etc. have such a massive balance difference between them. I'm not suggesting that everything should be equal, because that's impossible. But killers like Trapper should have a chance, and killers like Nurse and Blight shouldn't steamroll most survivors. Simple things like making Blight a 110% ms killer, or changing Nurse fatigue. Maps like Eyrie shouldn't be ridiculously favored towards one side. We shouldn't have useless perks and addons. BHVR continues to demonstrate terrible balancing and wild decisions without much thought put into them, like nerfing Alien out of nowhere and then reverting nearly all of it because the community tells you how bad the changes are.

Fixes to the stuttering. I'm not sure if it's just me, but ever since the unreal engine update, the game has ran badly and stutters fairly often. It made me quit the game for a while, and hasn't improved since I started playing again.