Knock should open bolted doors.

[Vitatroll]

It could use a boost; the only reason to take it now is to raid the armory.

I wouldn't mind if it was turned single-target and made into an emag spell. Price/timing would have to be adjusted, but it's better than nobody getting it. Wizards rarely need to open doors and taking down the robutts is just dumb when they can easily become yer robuddies. It'd be best if there was a range limit, though.