2v8 needs more
First off, I just want to say that "play while you wait" feature is absolutely superb, 11/10, it's a great solution to killer waiting times. The new items (except smoke bomb because it got nerfed into oblivion) add a bit of veriety for survivors, especially keys, which are really good for chest looting.
However, there are also issues still remaining. Not gonna touch map designs I am not interested in that atm. The problem for me is that the content is really lacking atm, killers are introduced slowly but that's alright, as long as they end up more fun to play compared to their normal 1v4 versions. And that's where I have the biggest problem with the mode: the killers are not really more fun to play than their regular options. Worst case of this is Deathslinger, who got 2 buffs, and that's ALL. There is literally no difference between 2v8 slinger and regular oen if you equip addons with same effect. On the contrary, the far more fun version is Wesker, who got a 3rd charge to his ability, unlocking very interesting possibilities in how he is played.
With that in mind, I wanted to suggest a few possible changes not only to killers, but to survivors, and the gameplay in general.
Killers Special:
Trapper - giving him all the traps from the start would probably be bad, most trappers will end up tranforming closest 6 gens into a minefield, so instead I believe making them simply closer to middle of the map will suffice
Wraith - not really much to change, he is simple, he is alright, I couldn't think of much and don't think he really needs changes
Hillbilly - no changes needed
Nurse - no changes needed
Huntress - no changes needed
Spirit - I couldn't really think of much because she is rather empty for ideas design wise, so the only idea I thought about is a bit of an experimentation: allow her to use her power even when not fully charged, like old legion used to. Though, that might be a bit too much in some scenarios
Legion - no idea how to even change him, personally never found him annoying as survivor, but he is really just plain boring, whole game is running while 28 stab wounding simulator
Ghostface - now, for this one I had an idea of fully embracing support role: The marked survivors are marked for eternity, let's say for about 3 minutes straight, but once in chase, the mark will expire far quickly, at a total of regular 60 seconds. The idea would be that marks will last for a really long time out of chase, so if your ally finds them he can try and use the exposed if possible. With current 30 seconds it ends up so completely useless that Ghostface is barely ever picked, there is no fun in having mark last barely anything, unusable to ally outside of ganging up, and unusable to ghostface because loops are too many too much for him to get a down by himself
Regarding ganging up, I believe that ghost face got such a weird nerf because devs were afraid of people playing him to always gang up with another killer, but by doing such nerf Ghostface ended up viable ONLY in ganging up
Oni - probably no changes needed, maybe at most greater range on orbs visibility
Deathslinger - the hated child of the mode, with close to no differences from the original. Simplest way: Give him a bunch more addons, especially the cooldown one. Harder way: Give him an extra type of bullets, which will have 2x range, break faster to prevent him getting stuck in animation, and maybe make him hold W being greater than holding S to close distance in such bullet
Nemesis - I have a suspicion that making more zombies is simply not an option, so instead the big zombie is mostly the one getting a change. Though it would definitely be great to give 2 zombies ultra rare addon by default, with extra duration, to compensate for map sizes. Now for big boy himself: a 4th tier, which buffs his ability only by reducing cooldown, but makes the virus itself airborne: infected survivors coming close to healthy survivor will make them infected too. The antidote also becomes temporary instead of permanent (This could be base thing for Nemmy with higher tiers lowering the duration of antidote effect)
Blight - no changes needed
Wesker - no changes needed
Survivors Special:
Most likely, they simply need more classes, current 4 are already played to death and people just stick to their favorite one. Another thing which might add uniqueness to all survivors: Give them 1 of their own teachable perks by default, and limit the amount of unique survivors to 2 max.
General gameplay Special:
This one is a bit much to ask, but hey why not
The suggestion is to rework totems, and tie their new mechanic to "offerings for the Entity". I am not entirely sure how it should work, but general idea is that both roles can offer something to the entity, and the entity will provide them with certain gifts, depending on offering size or maybe kind. The gifts can be pretty much anything one can imagine, from passive limited haste, being able to withstand 1 hit, being able to oneshot 1 survivor, blocking generators, blocking vaults for both sides, greater healing capability, anything really
Though, this is indeed a lot of work to be done, it is mainly tied to the fact that totems are completely pointless in 2v8, and could be experimented upon as optimal power objective
I love the mode, but it barely getting anything truly new is making it more and more boring, for me personally