Yes open lock would've been very handy indeed! It'd most likely have to be a master or expert alteration spell spell though, as theives would all start joining the College of Winterhold! imagine that.
Ithink however, summoning the Skyforge in athe middle of the dungeon whenever you feel like it is a bit overpowered don't you think?!
I would make a spells called Gamble that are pretty much similiar with Wabbajack.
If you cast it on enemy, there is 50/50 that they are kill instantly or you are the one who dead. Or something where you can cast on your armor, turning it into dragon armor or steel armor. :p
Earth spells to even out the elemental destruction types. Though, I would rather see elemental spells spread out into other utility areas, giving Destruction something beyond just damage.