Well, it's not very polite to discuss different kernel in this thread, but I didn't find anything special in the Extreme kernel. I have zero interest in overclocking as it just heats up the phone and drains batter faster. Audio is always the same for me, whichever kernel I use, this time it wasn't any different, couldn't hear anything special. As kernel uses stock wifi drivers, I do not expect better/worse performance. Long story short, I'm back to stockMind sharing your experiences? I Trust your judgment! How is the volume control and battery especially on idle and on Wifi ?
I can't keep waiting for FK forever. I may use the FK app to flash this based on your feedback