1) how much space a app uses in rootfs and to be able to delete it from there
Yes, am trying to do that.... managed to list apps, but untidily in an earlier version. Eventually i would definitley want it to do that.

2)#be able to delete things like the cache folder kind of like ccleaner on a computer
It will probably end up more like windows cleanup, but yes again, it should be able to delete temp files, run auto clean, move fonts out of the way, etc etc....

3) #could it show gps signal strength and wifi signal strength as well
Yes, i think it is satellite lock numbers though, and yes.

Will add these to the ToDo list later!