Metamagic, Elemental Augmentor, Focused Mind would all require some special UI additions. That doesn't automatically rule them out, but it does break the "Talents are passives only" guideline.
Manic Mage should come with a warning "This will screw you over 99% of the time!" The focus of D:OS's combat is making smart tactical moves. Casting a random spell is not that. It's not one I would ever use.
Control Freak is way more downside than upside. 10% extra damage to a target who still has armor, and therefore will not take actual health damage, and 30% less damage to targets without armor? Each cast of a spell will bring you closer to being less effective. And that's before you add on the extra penalty of -10% damage for regular spells. I don't see any benefit for taking something which only serves to reduce your power.
Quickdraw - This one seems fine.
Nimble Hands - That's already in the game called "Duck Duck Goose" requiring Huntsman 1.
