I know there are issues with the game.
Connection
Hit Detection
Lag
Weapon balancing
Host migration

But let's be realistic the game hasn't been offiicially out a week. No one can deny when it is running smooth this game is great.
Crytek can solve these problems and have said they intend to support the MP fully so no doubt they will.
They will be working on fixes right now but be a little paitent, plaguing the forum fully of complaining ain't going to speed anything up sooner. They know the issues they are taking info from threads here, facebook page, twitter etc.
They are getting the info and issues that need to be solved for every platform.

It will happen sooner rather than later but let's also realise that the game has only just come out and issues are still be reported so they are still getting there info so they can make sure with the first patch they can sort out the majority if not all then isuues that have already been posted (numerous times) here.