I still can't decide if this would be bad or good. One way to defeat Satori's mind reading, yes, but considering the story of the Komeji sisters I'm not sure if she'd be too upset after. Give her a chance of being normal instead of being driven insane by the amount of other people's thoughts trying to force their way in.
Well, that depends on how literal it is when she says that Koishi closing her third eyes also closes her heart. If that does mean that the eye and her heart is one and the same (and I like to think they are), then this is... bad.
I'd think Satori would prefer to read minds if it means she can keep her beating (probably) heart.