Yeah, with Totipotency, you could basically regenerate to the point of healing YOU, and creating a perfectly healthy replicate from whatever body part got severed.
It's the most powerful version of Rapid Regeneration.
“…Judge not what a man has done, but judge what he could have done if he was a different bloke altogether. For art thou a leper? And a leper can changeth his spots…” --Rudy Wade, Misfits (Series 4, Episode 8)