I can agree that it's not that essential to have a good way of handeling tile-sets, but a better way than Ctrl dragging IS essential. Right now people are just making engines, so it's no problem now, but when creating levels it is.
I'm just saying it would be a HUGE improvement and would probably not require much work at all to add a checkbox where you toggeled "painting" or something. Where you can click out the sprites instead of ctrl+dragging them.