Versus imbalance/unfair or problems you think need fix/update/nerf/suggestions?

[Bocs]

Just got back to L4D2 and started playing versus a bit more serious.
Have watched some videos of people playing versus.

Here are some I think should be address. (from me and from other comments I have seen)

1. (from comments and me)
Hit reg - Especially chargers or jockey or having high ping, i have been told to aim a bit in front of survivors. But sometimes it don't work
2. (from comments and me)
Animation- probably minor problem, like the chargers hit the survivor before the hit animation is finish (from a third person view), so far that's the one i'm aware of.
3. (From me)
Spitter lighting gas cans - Especially the finale of dead center, Big advantage for infected, but very annoying for survivors.
4.(From me)
Ex. 2 Survivors dead, 2 survivors vs 4 infected. - Unless your amazing at versus and such, this feels like a disadvantage for some people.

5. (From me)
Beginners or casual players receiving toxic/kick treatment - I'm not really bothered by them being on my team, what i am bothered is that they get kick for not knowing or being "good" or "pro". I try my best to give them general tips so that they don't get attack by toxic/ego players who don't like casual/beginners on the team. I'm sure many of you know how very toxic some players can be in the versus community.

Sure wished there was a tutorial mode in L4D2, to give new players a general idea of versus. thankfully the community probably has maps for that and a ton of guides.

Also a versus mode for casual or hardcore versus players (different settings like spawn time and such), unfortunately, most servers are public at least from what i experience

6. (From me) this came into my mind as i was typing, so i don't know if its a good idea or well explained.

after finishing a campaign, instead of just re matching or going to the lobby, let us immediately vote which campaign to go next. I notice some players don't want to play the finale and they decided on which campaign to go next, so i think i got this idea from that. I notice its like tf2, after a game end we can immediately go to another map.
I guess this is so that a game keeps going without having to go back to the lobby every time.

So far those are just my suggestion/opinions on the matter and for sure there is A LOT more from you guys. Would like to hear your thoughts/suggestion.

Don't know if its possible for a versus update since this game is 15 years old.
( i know there was the last stand update so i dont know much what change)