This would be a great idea combined with all the other topics raised like this:
https://bitcointalk.org/index.php?topic=5073921.0Every time I think of changing passwords or email, it can be seen as a suspicious activity in one's account, except if you proved it that it's still you. I'm up for the confirmation email, changing the password, etc. Creating that would be time-consuming and this is an old post.
If someone wants to write a patch for it, I will seriously consider adding it. I believe that safely adding 2FA would be very time-consuming, so I'm not willing to do it myself or direct Slickage to do it.