You don't need many points in telekinesis for it to be effective, and (at least in the last build) it's easy to max out with items.
A water barrel typically does 90 damage per hit at a cost of 2ap. Often you can hit multiple targets at a time. And there is no cooldown. This totally outclasses any other weapon or spell in the game, at least early on.
The only balancing factors in the game are the availability of suitable objects and the rather random effectiveness of throwing - many targets just can't be hit, and many projectiles are ineffective.
I think it's awesome that this feature exists, but it could do with a bit of balancing and polishing.
