I would like to see the following classes added to DDO:
Blackguard (the fallen Paladin)
Necromancer (being a Lich would be uber!)
Jerran (evil Halflings for those who don't know)
Battle Priest (Clerics rock, and this would make them even better!)
Are Assassins coming anytime soon? I hope so!
I'd like to see all of the alignments brought into the game and I wouldn't mind seeing the old restrictions such as 'oblivious' for certain alignments put in place, either! Its far to general as it is now and it makes the classes a little bland and too homogeneous.
What about Ironweave Robes for casters? And please...somebody do something about armor in general? The majority of armor (and here I mean all armor and docents too) is so ugly it makes my eyes bleed. I mean, jeez...it doesn't have to be the classic D&D style. But it can't stay like this either! I'd go naked on a dungeon crawl if I could. At least make it uniform and functional looking.
I'd also like to see restrictions on the classes involving alignment and race. For instance, if you're a Barbarian you shouldn't be allowed to multi-class as a Cleric--Barbs and Clerics don't get along, and the same is true for Paladins. And a Barbarian Monk is simply out of the question; no Barbarian would ever be a Monk because its against their nature. Further, the idea of a Lawful Good Barbarian is simply silly--but a Lawful Evil Barb is perfect.
Also, I have a hard time getting used to the idea of a WF Barbarian (nothing against Barbs or WF!), which just doesn't fit. A WF Bard, Rogue, Ranger or Fighter makes sense along with a WF Wizard. But a WF Barbarian, Cleric, Paladin or Sorcerer? That's just not making any sense. What god wants them and what cause could they ever uphold other than their own when they have no society and no society will claim them? Further, what dragon could ever have sired a WF? I mean, its not that hard to see why its so silly (at least to me) Also, I can see restricting the WF class to Neutral and both the Chaotic and Evil alignments in one axis at best because it fits their 'race'; WF are constructs, after all.
I'd also like to see the game appended concerning multi-classing, which in a certain way is being abused and is allowing classes and professions to do things they shouldn't actually be capable of. For example, if you are a Pally and multi with an appropriate class and that class surpasses your Paladin level you can no longer progress in the Paladin profession. Also, what about experience penalties for multi-classing?
Its the little things and details that makes the difference between a good and really great game--at least to me. Maybe if someone started a poll we would see if others feel the same as well? Other than these few suggestions, love the game and always have! Thanks to the devs for all the great work!