Here`s how i see it.. infinity ward failed with infected.. just like everything else they fail with.

Infected would be good like this:

Two playlists:

First one: Infected with throwing knives+good maps & good guns playlist rotation + with all the "camping spots" for survivors unpatched.

So the survivors don`t complain about no good spots to "camp" in & the infected can`t complain about not being able to kill the survivors.. even if they are in a hard to get spot, you have a throwing knife.

Second one: Infected with no throwing knives+good maps & good guns playlist rotation + with the extremely hard to get to spots for the infected patched.

This way the infected on the tactical knife only playlist shouldn`t complain about no throwing knives.. because they are the ones who chose to play it.
If the survivors die straight away and then complain about no throwing knives, maybe they should try a little better at not getting knifed :dumb:

Also, they should remove split screeners.. people are still boosting & blocking doorways.

I think* the reason why they can't make two playlists like that is because they are at/almost at the max playlists, or something like that.

Answer = see which playlists have low player counts and remove them.

Imagine how frustrating it would be for the infected in some cases where there weren't throwing knives present.
I only believe that throwing knives should be used against OP weapons (IE, striker and FMGs) or else it would be near impossible to get any kills as an infected.
My other option would be to award an infected player a throwing knife for each kill they get. (max:1-2) It would be similar to the specialist perk, but only awarded with a throwing knife.