Hm, sneak at 5 is basically the highest you can go, isn't it?
I'd expect it to be somewhat powerful, but I guess that some high-level chars might get better chances to spot sneaking chars even with sneaking 5.

The discussion is a bit strange however, I'll never understand the argument "skill x is so strong you absolutely need it on EVERY CHARACTER. Now that I have it on EVERY CHARACTER, the game is too easy. BUHUUU, fix it, it's broken."

If you break the game on purpose, don't wonder that it's broken...