Unlike everyone else says, I have successfully used PhilZ recovery in past updates and tried the same here. It showed an error with eglsubAndroid.so and after looking around I found that it's part of the GPU drivers. I remember flashing an April update and I think that may be one of the problems many people are having.
Does anyone have a flashable zip of the drivers from the stock 4.4.2 ROM? I'd like to try it and see.
Thanks in advance