No. Lesnar NEEDS to be a heel. His babyface run on SmackDown was the worst run of his career by far. Turning Orton face is a much better move, he needs to move forward from being a tool of The Authority. They could turn Orton face tomorrow with a single promo - just have him in the ring with Lesnar, putting Lesnar over by "admiring" how Lesnar broke The Streak and decimated John Cena, and saying, "Doing all that, I guess that makes you... a legend."
RKO
"Say hello to the LEGEND KILLER".
Instant face turn, instant recovery from a year of being useless.
Fair enough, though the fact that we need to even debate Orton or Lesnar turning face shows how big of a problem they have on their roster.
And I agree on Ambrose.