new bosses, more and more and more TOUGH (and I do mean TOUGH) mobs, that'd give tons of xp/sp/loot, some of those mobs only soloable (somehow couldnt attack with party...). would beat the hell outta killin 99999999999 mobs, just go and kill a couple and get better xp/loot, and a lot more challenging....
even better loots on raid bosses, make them even tougher (and bigger lol)...
item-dropping when pk'ed... thats sometn i LOVED about UO back when it was T2A.... u dropped all u were carrying... so u'd have to stash ur stuff... but since items r a lot more difficult to get now there (and here of course), there an insurance system that works nicely... u pay an amount (based on quality of the item, it should be.... so u'd pay say... 10% of the value of the item to insure it) and when u'd die it wouldn't drop, just the money u payed to insure it... it makes for better pk'ing :P lol
lemme see... new skills, sure.... new races and classes, specially races....
would luv to see some new dwarf-made-only potions... or maybe another class, say prophets of whatever... kinda like alchemy skill on UO... and some other stuff i can't quite dig up right now