should be a max ping filter in the lobby browser.

Ok, sounds reasonable.
But what happens if you click "Ping all"? Reload the list and then ping? Because otherwise, many servers will be lost. (Argh, you probably don't understand what I'm trying to say)

Ability to select the ping range? 1-100, 101-200, ... or an editbox?

An editbox is enough for me.

Or you can sort them by ping and game style like i do.

I do that now, just would be better to add this simple coding in.