With regards to lvling, I didn't really get that far into the server (my time is spread thinly atm as it is!)
What was different about their leveling to other servers?
1) You start off with a skill. Tao skeley, Wizzies a fireball type
2) The above becomes part of your kit not useless after leveling. Taos get 2 skeleys for example
3) All new start areas, caves, sub-bosses and quest chain that rewards items that can't be found or bought that would be equiv of say a sub or boss drop in form of a wep like a 2-2sc wand would be best i could get for decent sized quest chain regardless how much gold i had. Would still need all other kit but nice getting that one strong item rewarded for time investment
4) New skills added and others revamped to be part of your kit. Taos added % exp buff for party to create team hunting.
5) Pet rental to help with earlier lvls. Can obtain tickets from subs and daily questing or spent 50k cash (would take 30 mins or so to get 50k by cash farming chestnuts be hard otherwise at start levels as little cash in caves so is risk vs reward for time invested). Pets offer no benefit in PvP
That's my 2 cents!