So one of the things I really think is need is a huge overhaul in spellcasting, mainly in terms of visuals. For instance as you level up and learn more and powerful
and difficult spells they become larger and differ in appearance. You may start with flare which is a simple fire ball,while Flame Tempest could be this huge pillar
of fire coming out of both hands. I think it would add greatly too the game and make leveling up feel much more worthwhile.

http://green-oval.net/Board/a/thumb/0367/45/1277412413747s.jpg