Yeah, I think an "edit" op would link to the post it mods, like reply does. The UI could show last ver by default but with icon & nav arrows that let you page through the edit chain.
Furthermore, you *could* have edits use a diff more cmpct fmt. Basically just apply edits to previous content. Like insert this string at this pos, etc. Might allow longer posts too.
This is sort of like a "stream" protocol. Akin to UNIX terminal ESC codes. Could clear screen, move cursor, etc. Could be compact way of chaining content *besides* edit capability.