MIUI isn't meant to run with the special DPI settings (or tablet mode, for that matter). It would cause incompatibility issues.
He's probably referring to other fixes C3C0 made (like native wifi tethering). PA on Android 4.1 is based on CM10 just as zukriaksah's MIUI, so I'd say it is possible to port those fixes over (but I don't know a lot about rom development). Of course the Hybrid Tablet mode is specific for PA.