I agree with the idea of suggestions being integrated into the forums. This makes it so you can find everything in one place and it’s easily manageable, too.
I’ve only been here for a day or two, hopefully I’m here a year from now. I really enjoy the community here (at least from what I’ve seen so far) and it’s been a ton of fun.
One of two things should resolve this. Firstly, try restarting your client. If that doesn’t solve it, just wait and try again later. Mojangs authentication servers go down for maintenance from time to time before they return.
I have experienced this lag, and it makes it near unplayable, but I trust the developers and staff team to deal with it. KitPvP getting its own proxy is a good start, and I'm sure with other changes and optimizations it'll be dealt with in due time.