It'd even be nice to have this feature in automod too, though implementing it there admittedly might be more difficult than -ModTeam. (Random other idea: Automod feature to leave removal comments as -ModTeam).

I've implemented this already in my bot, and it'd be easy enough to copy that feature if anyone wants this without Reddit's directly supporting it; any post that's approved, it'll check for anything that looks like a removal comment, and remove that comment, also unlocking the post if needed. Removing the comment hides it from the user, but it's still there for moderators to reference if needed. As you can imagine, this makes restoring posts way easier, as only one click is needed instead of up to 6.

Not related, but another big thing that trips up users about removals, is them editing a post to correct the problem it was removed for, and not realizing that there is no way for mods (without bots) to even see these posts to approve them (due to a bug, they don't show up in the edited feed if the user fixes them right away). I have my bot handle this by either telling the user to make a new post, or just silently re-approving it; I don't have a good suggestion as to how this might be adapted to a built-in feature though.