For people in LP3 with LP7 CF-root kernel
I tested as some people says and it works, but ... not as smooth as with the original kernel.
Finally I follow the Mobile Odin path to use the original kernel and it is more smooth than the LP7 kernel... maybe a placebo effect...
So I am root but I do not have CWM to be able to restore/make backups, so waiting impatiently to Chainfire kernel for this version ...
In that short time my view is LP2 is more battery friendly that LP3, but as I am travelling and I did not do a controled testing I can not say more than that!
Device: Samsung Galaxy SII
Rom: Intratech Frankestain (XWLA4)
Removed Samsunmg bloatware.