Well, I will edit if the need arises
Of course it is limited when it comes to number of people he can control, it is not like people cannot resist it, it is just more so, people are less aware of it.
Also, I thought, using his personality, it can counter-balance it, the ability is op, but the person will not use it in an op way. Something like that.
Well I will wait for what Garrison says.
And also, from what I understand, it is against NPCs, for one, and two, the bracelets have only worn down, they are not completely free, so the ability would be restricted to a certain extent still. For example, only mind reading and controlling one person, or can alter memories but not control anyone at first and then it develops more into a control X people, or change one guard into an ally by changing their mind completely, but temporary effects.