/agree on all that. I think the Mage class could use some balancing and work done. Sometime not charging a spell should be a good option.
Like you said no charge = single target, maybe have a addon to the skill that increases damage when not charged and the other addons give aoe capability or status effects or damage over time. I also would like to see an ability that debuffs the enemy and any spell that hit him have a chance to restore X mana to help with the mana problem