The only freestyle is lower-air freestyle.
Seriously, I think having names in upper/sit/ground combos is kinda useless. I never say "I did aproll-rproll-rproll- etc." Blah blah blah. it's all dumb, I just say I did an upper combo. Easy as that. (my opinion of this has changed over time.)
I couldn't imagine naming a ground combo...
Sure grounds is freestyle, just don't throw a bunch of names at me, I'm already overloaded with these j9skatws and what not....