Brad - Consider this thought. In EQ so many classes had powerful spells. But what made the spells powerful? The game was difficult. Imagine the same spells in WoW. SoW? ok, so i get around a little faster, no big deal. Teleports? Ok, so i save 2 mins instead of a flightpath. Clarity? I have drinks already. Resurrection? I didn't lose XP, and the graveyard is 30 seconds from where i died...
Everquest was so special because the game put the power in the players hands.
In EQ,Travel is long? Well instead of NPC porters, Wizards and Druids get that power. Dark at night? Enchanters get infravision.
The point to all this is, the more things you can make challenging, or even things that players HATE, gives you an opportunity to give players an ability or spell to counter it. Naturally not every class will have the counter, which makes players rely on each other more. Any time you can give the players that power, you've done a hell of a job in this type of mmo you're going after. Also, you have the opportunity to have effects on your gear, or clickies that were so fun back then. You start of the game trying to save up for a torch, beetle eye, lightstone etc. A few levels later you get one. Once you start grouping you start getting the infravision buff more. Later you do a quest for an infravision clicky.
Please give it some thought