His Charelston would be amazing, tbf. I'd love to see something Nicholas Bros-esque in tailsuits. So, I want him to do it - and I think he probably will - I'm just thinking skipping it might be better for Nikita's knee and also deflect the criticism that he can only do fast dances with tricks, etc, esp as this CC is likely to show off literally every bell & whistle.
A good Waltz or FT would show potential progression and a different side, but the risk, as previously stated, is dropping into the B2 if it's not scored highly, or seeming a bit boring in comparison to the other routines.