Philz Kernel on Paranoid Android 3.15?

So I generally feel I know my stuff to a limited degree about phones, but I am unsure of this...

I am using the standard "safe CM kernel" but have always prefered Philz's interface over native CWM.

Now what is the issue with this, why people don't seem to like his? Is it the fact that he's not open source 100%?

And would there be any problems with flashing his kernel onto PA and over the default CWM 6.0.1.4 (or whatever the most up to date version is)?



If someone can explain in laymans terms that would be great.

Thanks