A massive portion of the game's imbalance issues could be solved by literally just adding comms.
Before you assume I'm an xyz main or whatever please read my whole argument. Not giving survivors comms as base kit is the most easily fixable aspect which would create a much more balanced environment for EVERYONE.
As a solo survivor the most stressful aspect of the game is not being able to communicate with your team, especially if you know they are SWF or everyone's just not being able to coordinate and instead of being fun games just become annoying and unfun.
When you're playing SWF and there's 1 or 2 randoms it's the same issue; it's almost impossible to communicate with people using our 2 available emotes.
And as a killer it's more than obvious that the most stressful part of the game is facing SWF teams, especially in high ranks.
Giving all survivors a way to communicate (walkie talkies, magical entity telepathy or whatever) would instantly breach the gap between solos and SWF and gives an opportunity for survs to have a more enjoyable and much less frustrating experience and to balance killers accordingly and apply the necessary buffs and changes to make every game an even playfield in which both sides have opportunities to win if they play correctly.
Now before you say we can't force people to use comms, I understand and I wouldn't want to make DBD a stressful experience for people with anxiety or who don't have mics to communicate. We don't even need to have literal voice chat or text (since it would be hard to use it while struggling for example), but a quick comms option similar to Overwatch and other team based games would massively increase the quality of solo survivor gameplay, and everyone else by consequence.
Devs said changes to Kindred are one of the ways they're trying to bring solos to the level of SWF but if anything they keep making it worse by proving they don't really understand the frustration of solo survs at the moment, and I can bet despite it being a decent buff its usage rate has not changed in the slightest. Why should we have to run Kindred just for a chance to survive while the 3 man squad can use that slot for DS, DH, etc without sacrificing team coordination?
I'd love to know what you guys think and if the devs have already said anything about this, but I have no doubt it would be a step in the right direction.
Edit: since I think I wasn't clear enough I DON'T think implementing voice comms would be the best option, and I meant Overwatch's voiceline wheel in which you can easily access a few useful phrases such as heal me, I'm repairing, etc.