Eh, not really, Pathfinder just made all sneak attacks do 1/2 on anything normally removed. Pretty much everyone I've talked to agrees this was a good change, and was definitely not overpowering. I would actually change the capstone, depending on how common magic items are in your world. (in normal high level games, it wouldn't really matter because any self-respecting rogue has either blinking or has some other way of consistently sneak-attacking.)