Here are a few I thought about
Quest/Crafting Rewards
-Could be interesting to have a ~lvl60 quest/craft to augment or change quest cloaks.
change the cloak entirely, make a portion of it's charge ability permanent (remove charge), or perhaps lower the power of it's charge and make it infinite.
-Set bonuses are always maximum fun (thanks Megaman X and Blizzard)
Collection could be a process - mix of crafting/boss killing/questing.
If your feeling sadistic you could make a few pieces limited to encourage PVP and some mean-spirited gossips.
-A way to change race or boost base stats (could be game breaking)
-A quest or event to summon an evil/neutral/good boss in town that roams around, maybe killing gaurds and players. Could make it drop a semi-decent item or lots of money to make it more of a fun distraction than an interruption. Die on cleanup
-Maybe make lvl 30 questors loyal and nuke on lvl 45, just to encourage rotation.
-Expand the lvl 30 quest area: Hides can be bought so that drops the challenge a bit. I like the idea of a boss or something, maybe requiring the use of non-standard spells like Flash.
-Quest/crafting to improve rope and grapple or skiff (maybe drop enc, or grant access to other areas)
-PVP daily - could be inside the portal arena (could limit entry to encourage fair fights/competition)
-Craft drops requiring scripting of off-areas
Power curve
-Perhaps make areas/bosses that favor gear selection that sacrifices high damage for higher defense or greater resistance. I'm not sure how well this would work, I think it was tried with the dragon areas, but not super successful. AQ mask for ocean works pretty well for this, but I'm thinking more of stacking specific types of gear that'd make highly difficult impossible areas/bosses possible/rewarding.
Classes
-WH - Maybe have some sort of buff against magic bosses (e.g. drain energy to drop swings/spells if possible). Supposedly they don't have a cap on their resistance to spells although MME says 75%. If there is no cap maybe more ways to get more MR.
-Paladins - I dunno, maybe three handed weapons, a way to attack two mobs at once. something nice
-Mages - A ridiculously difficult quest for a mage staff, maybe costing thousands of runics and several Wet scrolls.
-Bard - Randomly gossip song lyrics from terrible acts (Celion Dion, Stryper, etc.)
-Class Reversion - Have no idea how to do this, but always thought it'd be cool to evolve into a specialized or buffed vesion of your class at the cost of levels
Exploration
-Area that requires prot good, or prot evil - if those work well.
-Undead area where healing damages mobs, or provides some kind of debuff.
-Puzzles - Tower of Hanoi is a popular one, or spelling something out through steps ala Pyramid.
-More gambling - higher stakes (maybe items).
-Mazes that use colored text to hint at solution (if possible).
-Mazes that crash Megamud with wrong turns.
*These are all just ideas, certainly not suggestions. I'm not sure how much any of these would be game breaking. I'd be more than happy to help test changes you make if it's ever needed.
**This board is awesome, really appreciate all the stuff that's been added, very clever stuff.
***Waiting room at the hireling shop is spelled 'waitng' I think.