Having tested some things there are a couple suggesions(im not inherently again the ability as it lasts only 8 ticks and poses a big issue when it wears off with bard songs being area. Lots of hassle few would be motivated to keep up ontop of veil also heavily influencing int)

What does need consideration is mobs that cant track out of area also not able to leave area even if charmed. Think darsylon guards. As once the charm wears off they can be bad for younger chars. Many things cannot be charmed but that is one issue. I still think perhaps they can be charmed but not leave confines of the area they were coded not to wander out of.