Yep, I would really appreciate this feature.
I do actually left Evernote and tried OneNote just because of this, not being able to copy-format/paste-format is a really big deal for me (Idk if just me, to be honest)
I didn't like OneNote that much, reason to be here writing, Evernote is my main studying notes repository, I love it... the only missing piece for me is the copy format button (maybe a command combo like command+shift+c) or something like that
Thanks for reading