For competition, I switched from Glock to Sig 320 a couple of years ago. A gamed-out GGI 320 gave me about a 10% advantage in most scored drills over a gamed-out G34. I was just at the range working out with a G34, and that appears to still be the case. How big a deal is 10%? At Production Nationals in M class, it's likely to be substantial.
I really have no idea how the switch to the Shadow 2 will go, but given how many of the Supersquad shooters use similar guns, I'm hopeful that it will be at least as good for me as the 320 is.