Played a few Deathmatches and there's still a tiiiiiiiiiiiiiiiiiiiiiiiny bit of invisiblility sometimes, but it's not nearly as bad because the name/energy bar is still visible and you can still lock on and murder them.
These were just momentary blips. People weren't invisible for the entire game. Saw about 5 instances of it in 5 games, 50 of gameplay. Not bad.
and WOW, that explosive burst is ruining my shit.