Uh, you're right about TK and air magic. Those are definitely evocation.
In my view evocation is about manipulating the elements...in YS 254, it CLEARLY states air magic would be used to pull apart locks, move objects around, etc. Water can change, dissolve, cut things, Earth can strengthen or twist things (magnetically i am thinking).
I think one problem I am having with the rules are evocation seems to be pigeonholed a bit too much into being pure combat oriented, I think this might be due to harry's whole not so subtle aspect in a way, he goes for the big blasts!! Perhaps the view would be a bit different if we saw a bit more magic use by Elaine, or Ramirez other then pure combat.
Am I off base here or does that make sense? The lockpicking just doesn't seem like it would be something thamaturgical, especial given it being in the example for air evocation.