The jumps are critical to XMP. As Naib comments, Rampant base NEEDS these jumps unless every match is destined to be a draw...Sirocco and Garden are also great for them, I've found a jump onto Blue Node's cliffs on Sirocco and as far as a I know, no1 has ever been on those cliffs as a Ranger.
My point is if they didnt exist, I very much doubt people would have played XMP for such a long time. I've played this game for a long time and it is these additions which keep me coming back for more, it is a near impossible game to master. With other fps games, after a couple of months, you master everything and know everything about every map, then it gets boring, which is where I feel U2XMP is different. And this difference has everything to do with walljumps, altering them in anyway I can only visualise as being bad for UTXMP and without them, all I can see is another medicore fps with nothing to set it apart from the crowd...
[Incidently, we are hoping to have our vid out in 1 week or so...]