BeyondUnreal had an interview with Steve Polge from Epic Games about their upcoming UT3:
BU: What are some of the UT 2004 DM and CTF weapon and gameplay challenges that you will address with UT 3?
SP: We’ve gone to a lot of effort to improve the movement feel, and the changes we’ve made to movement have also allowed us to make the scale of the environments more believable without cramping gameplay. We’ve done some tweaking to weapons to make sure that projectile weapons and hit scan weapons are appropriately balanced. Replacing the shieldgun with the impact hammer also addressed balance issues with flag running in CTF.