I really, really like the current jerseys and I was very happy when we got rid of that awful RBK Edge piping and went 'back' to the early 2000s look.
That said, I would have no problem making the powder blue our 'main' color because it would address my only 2 complaints of the current set. My biggest complaint right now is the white numbers. I still greatly prefer the yellow numbers and I think we'd pretty much have to go with yellow numbers on the powder blue. My other complaint is that our current shade of blue is pretty damn similar to Tampa, Toronto, Vancouver, and the Rangers. Buffalo, Edmonton, and the Isles aren't far off the shade either. I think you could pretty reasonably argue that there are currently 8 teams with a 'royal blue' home jersey in the NHL. Going to the powder blue would give us a unique primary color.
I hope we don't lean too far into the cream if we are making this the primary branding though. I like the cream for winter classic jerseys made to look retro, but I don't want it every night. Goalie pad manufacturers really struggle to match cream coloring too. Give me straight white roads and straight white accents on the powder blues if they are becoming everyday jerseys.
But most importantly, let's get that STL treble clef logo on some official merchandise I can buy. Keep it as a shoulder logo, or a helmet logo, or a pant logo. I really don't care how they want to use it (so long as it isn't a new primary logo). But let's get it on some hats I can buy.