Nice mod! Realistic one: sound and image effects and physics. I liked mouser and mortar weapons, although this last is limited.
Well, I think you have to "increasing the jump force" a little. Although it is a "more real" feature, you will use more the rope and some "traps" (e.g. you are in a hole, rope does not reaches the roof and do not have necessary strength to pull you off, so will stay in a hole and cannot get out) will appear in some maps, for example in [s00t]battlefront1.lxl (
http://www.openlierox.net/forum/index.php?action=mgallery;sa=media;id=5612;dl on "the left size of the house") and [HW] House.lxl (it is so difficult to go from right to left size of map; you have to use rope until roof; with more jump force you could jump from the tree).
Also, some mysterious sound appeared once when I play with three other bots, as I had bullets falling in near floor, although I did not shot anything and the three enemies were far away.