I think a lot of the changes are good for solos
For the solo queuers as a whole I think the changes help.
Many times I see a 3 or 4K when doing solo queue it's because of NOED and altruistic survivors hook bombing instead of looking for the totem or a facecamper and survivors do rescues without BT instead of gens. With NOED, it's now incentives and much easier to take out the totem first and then do the rescue.
With the basekit BT, for 5 seconds the survivor has an Endurance effect and, very importantly will be at 4.5 m/second so almost as fast as the Killer and this can go up to 15 seconds at that speed with the actual BT perk. Plus, if the Killer hits the just unhooked survivor this gives the post hit speed boost on top of that.
Camping was not directly addressed but camping only works well if the Killer can rehook the camped survivor or is Bubba, infinite Myers, etc. If people hook trade then the gens will be done before the Killer gets a kill and it'll be a 4E.
Speaking realistically I escape as solo queue between 50 to 60% of the time but many times that I don't it's because my teammates handed the win over. Either they were too busy pallet stunning and teabagging the killer and not doing gens (while ignoring that pallets are finite), I was left to one hook or die on second stage even though the Killer was far away from me, hook bombing a facecamped survivor instead of doing gens or someone DCing immediately on first down or suiciding on first hook. That's the fault of the survivors doing it; not the Killer.
Gen repair time is going up by 10 seconds but gen regression perks got nerfed. I consider Ruin and Pop to have gotten shot down in flames by the nerf cannon and there are more ways to get a buff to repair speed now.
Self care got hugely hit as well but Botany got an amazing buff and, paired together, are close to the same. CoH and Medkits weren't touched and, if anything, got even better if stacked with Botany.
Off the record is really good now as well. Sure, it goes away if you do anything productive but if the Killer is trying to tunnel you chasing you for 30 seconds, finally catching up, and then watching you race away with a speed boost and Deep Wounds instead of a health level will probably discourage that in the future.
My solo games are mainly the Killer gets 2 to 3 hooks or a 3 to 4K because the survivors hand game to the Killer with a much smaller mid result. Based on what I see in my games I'm obviously not at high MMR as solo, probably mid, but only very rarely do I see a Killer that's good enough at chasing, splitting pressure and dropping chase when needed to do well that way but those games, win or lose, are the most enjoyable since I get to play.
Overall, I like the proposed changes. I may like them less or more after they come out depending on what practical over theory is like (and QoL for solos won't go up really high until we get the info changes on the HUD telling us what our team is doing) but I think the quality of games for solos as a whole is going to go up at least a little. I definitely don't think it'll be a disaster.