You have to give credit to the WWE though for being able to give a quality explanation for his physical appearance. It was all in his head.
I also feel like it was hard for him to go back to the mask. I'm sure there are ways we could come up with that would be better because they had a decent idea the execution just sucked. It wasn't so much Kane as it was everything going on in the WWE especially on Raw. The fact Shield, CM Punk and Daniel Bryan were able to become big names in the industry during this time is beyond amazing. Even Ryback was killed off in season one.