Tree view is sorted by pid only, sorry. I'm afraid moving entire subtrees based on other criteria (such as CPU%) would make the screen unbearably jumpy.
I have a ton of mariadb processes (I don't even know if this is normal, but it seems to be working just fine) and it gets tiring having to scroll them just to glance the numbers on other processes.
https://www.dropbox.com/s/ghwsh6ye1gt32k1/Screenshot%202016-...