This is totaly unfair. To have true seeing see thru invisibility spells is one thing but to have it see thru hide and move silently is totaly unfair to rogues. No point in taking those skills then.
Set the helm price much higher or give an only rogue used dispelling item.
Mages for example stuck up elemental shield, use true seeing and cast time stop and then follow up with bigbies hand on me even when I´m in hide mode with really high hide and move silent skills. So mages have a way to attack me. But if I attack them elemental shiled kill me before I kill them. So if mages and clerics are gonna have an upper hand with true seeing items then rogues should have a dispelling item too.