Hi i got referred here for my ideas and input to make UT better, sorry for a long post but it would be greatly appreciated if you read it as I’m a die hard UT fan 
Give warfare an option to disable orbs(ut2k4 style)
bring back dominion
bring back a balanced assault(fix spawn timers and placement) (reminds me of conkers live and reloaded)
bring in king of the hill(was such a fav in perfect dark)
bring in mobile item king of the hill, or mobile with Damage over time on hold(like the skull thing on halo, but with a DoT twist or even a proper portable box where the more teammates are in it the more score you get like a portable hill, so they get blown up easily with rockets lol…)
new game type phantom: default> can only attack phantom(deathmatch), phantom is red, longest time being the phantom + kills give +time = win
Stealth Phantom: limited stealth ability(stealthed but clear polygons so barely visible), more melee oriented, once killed you stealth instantly and become next phantom(evolve like feel).
(also level up over time for increased damage and health, creating a balance where once you go past a certain buffness you have literally most likely won the game from skill)
a mode where the center has a elite for each team ‘construct’ type enemy where you have to charge it up to go against the others bases of some sort.
Maybe not include the 5-6 small layers of mouse acceleration even though that was very well done in UT3 so well done in fact, well up to you i guess, but most competitive games(source engine for example) don’t utilize any form of acceleration. The biggest flaw with UT series which results in less people playing is the netcode, the netcode in the unreal engine is quite terrible to be honest, no matter how low your latency is for example 30ms, when you fire your guns they delay by that exact amount making aiming near impossible, also since no servers are in Australia playing with near half a second delay… well yep you see the problem. The best games netcode i have found with high latency is of course the release of halo 2. Im not sure how they do it but latency doesn’t effect your guns(delay) at all, it doesn’t even affect 'hit registers from ‘your screen’ instead of relying on server side, but if u hit someone 250ms before you die with 300ms latency that hit doesn’t count obviously, maybe implement some sort of net code like that to increase the amount of players online, because as it stands now the game(as fast as it is, all UT’s) its net code makes it terrible to play on anything BUT LAN.