I tried FEBA and WF. They force you to use those god awful basic models with horrid skins(though the original are just as boring). Not sure about U4eF, the models are corrupted for some reason. U4eF Might of been sweet to use with jailbreak, if the models didn't turn into blobs of splattered paint. All I found was WFUT, not WFA, if there is any difference.
I can't find any maps for UF other than that 70 MB bonus file with about 20 maps, but that's hardly much.
I suppose im stuck with UTC. It might just be the old weapons and 3 new ones, but least it adds a little flavor and lets you keep the models you normally use.
Still don't know what you all mean by customizing their skills or w/e.