Sorry for bringing up this old post, but
What about allowing quick edit for text only?
In my case, I like to read my own post after I publish them and sometimes I discover misspelling or wrong/confusing phrases.
Opening the editor page is too slow and annoying if you only have to change “etso” into “esto”
Or maybe adding a quick note or update.
I like the inline edit feature in MyBB that uses AJAX.
(https://www.mybb.com/features)
I’m member in a linux forum (preguntaslinux.org) that uses mybb and it’s a really useful feature.