It's been a while since anybody said anything about /flip and I think that is because everyone just accepted it.
But really I think the best way to have it is by having still where you have to be stopped to /flip so you can't abuse it.
However I think that it should be something to get you guaranteed back on your wheels like the old /flip, simply just puts you up right with none of this rolling around from side to side like a retard, often taking about 3-4 attempts to actually get going again.
So if you could just make it that little bit nicer I think it would be a lot better.