Ideas and suggestions.

But this is clearly unnecessary: having the ability to steal a control spell on the adventure map.

If everyone is complaining about the lack of control, why not create an additional way to obtain it? And a skill that only works in the final battle doesn't seem very appealing.

By the way, here's another interesting detail for those who pay attention (it's so interesting that I'm not even sure if it should be added) - the ability to see what spells master genies, fairy dragons, etc. can cast on the adventure map, and the ability to learn one of these spells.