I was one of the MP Beta-Testers for Painkiller.
The game simply isn't up to par with other current games, and really shouldn't have been chosen. Part of our grips with PK, as 1v1+ beta-testers was it's lopsided gameplay, poor map layout, poor spawn zones, weak air control...the list goes on.
PK wasn't even designed as a 1v1 game, which you may notice when you try to play it. Spawn zones are simply too close to each other, ammo is fairly unlimited due to the high rate of weapon/ammo respawn/ammo stacking, armor control is too easy, etc.
These are all serious game play issues that we logged and tried to have the developers change. 1v1 games are not even coded into PK, unless you play LAN or have some sort of pro-mode created which will allow a proper warm-up and countdown.
Sure, it was in two comps, but after CPL the game died, and for a reason. The image of the 10 players on 24 servers shows PK going stronger than it did when we beta-tested it. I can't even tell you how many times I'd go online to beta-test on the PCF servers, only to see 0 players out of their 10+ official beta-test servers. I'd go into a server, hop around for 15 minutes, attempt new things, try to time stuff better, see if I could find a reason why specific bugs were occurring, and then sign off, report bugs, and that was it.
Shame they chose this game, not only over UT2k4, but over almost any other 1v1 FPS game out there.
-I_AM