That’s interesting. I play TTRPGs via play-by-post too, and the norm for me involves declaring your actions before the roll. I can see why you might encounter friction with failed rolls from your example, but usually the action is framed more as “<Char> launches themself off the floor”. That leaves space for the GM to narrate the result, succeed or fail.
Hmm, I guess that’s where we see things differently. To me those choices aren’t part of the “Go” before the “Roll”, while you group them together under “Go”.