Here's a request for a small tweak, for the very bottom of your To-Do list if you like the idea:
Could you widen the scroll box box inside our Public Profile page for
"Signature appearing below your posts:"
?
Just to make it easier to see and edit what we've copy-pasted there.
I often want to chnage just a few characters after I see how it looks, but just finding and changing one char is easier if I copy-paste it all into some other editor, and back.