guess what ...
it looks like i solved per app dpi! in the next update you will probably be able to define in your build.prop custom dpi's for individual apps.
if this is working out as i expect it this will once and for all
end all troubles with tablet mode and there will be no
excuse for you anymore to pass on it. this will also be the first and only rom that has such a setting. right now im still testing, i hope this is really working out as expected ... cross your fingers.