As for bots, it would be incredible if someone wrote some really decent ones. However, even crappy ones that just sortof jumpjet around the level and let you shoot at them would be nice. Bots are great for small lan parties. 3 or 4 humans and throw in another dozen bots. Even if they're crappy, it's still good.
The only danger I see with bots is if they end up in internet servers like some other games I can think of...
Oh, and just to clarify, XMP doesn't run on the U2 engine. It runs on the UT2kx engine (although it's forked off from that awhile back too). This was a smart decision since U2 isn't that good of an engine for multiplayer anyway. So the maps and models and stuff are pretty much compatible (it's just that they can't be used for legal reasons.)
The only danger I see with bots is if they end up in internet servers like some other games I can think of...
Oh, and just to clarify, XMP doesn't run on the U2 engine. It runs on the UT2kx engine (although it's forked off from that awhile back too). This was a smart decision since U2 isn't that good of an engine for multiplayer anyway. So the maps and models and stuff are pretty much compatible (it's just that they can't be used for legal reasons.)