that might not be fully true. i am running MikG 3.1 with the stock HTC kernel, and wireless tether / hotspot works for me, both through apps and via the built-in hotspot function.
if you're using the app WiFi Tether, there's a checkbox in settings that you have to tick to make it work (Routing Fix). otherwise, devices will connect, but won't fully connect.
also, my battery life has been fantastic the past few days. just slightly over 3 hours of the display being on (using the stock internet browser for 99% of that) with a single charge is about 45 minutes longer than any non-rooted session i've ever had. also, with SetCPU dropping the processor to 245mhz with the screen off, i only lose 1 or 2% of battery overnight.