Adding him and someone like Misa or Hagens in 26/27 would be a huge boon to the forward group.
What RK has done this season is so damn impressive. A PPG pace despite not having anyone on his team anywhere near that. I don't think his game will translate as nicely as Kaprizov's or Kucherov's or Panarin's styles have, but he's still showing top line potential; just probaby not at that 'perenial All Star' level those guys are at.
@EbonyRaptor's comparison to Hagel seems about right. Blazing speed and tenacity. Smooth enough hands to maintain puck control at those speeds. B level shot. 2 inches shorter than Hagel, but around the same overall weight (at least according to their EP pages).
He'll be a real solid addition when he comes over and has PPG upside during his prime years.