I think it'd be beneficial and interesting if Crytek implemented a "Online player count" on the MP screen.

Not only does it give a scale of how many players are on so you are't sat in a lobby on your own for 30 mins but I find it quite interesting anyway

Whatcha think?

Sure, why not, would be nice, though I would put my attention on more detailed filtering options, preferably something where you can tick specific maps and gametypes you wanna filter.