User blog comment:OneFilthyHobbit/Move stealing Champ plz/@comment-4434378-20130410032221

League has a less flexible interface than DotA. Rubick steals with R and then gets a special slot to put the spell. You could have the spell go in your R slot, but then you look kinda dumb when you steal Karma W and then have to sit on it for a while.

And I think you don't understand the spell very well if you think that Spell Steal is boring in DotA. You can't steal passives (except for like Morph), and most spell you steal have some really cool synergy with his kit (Getting the equivalent of Cho Rupture on him when he has telekinesis).