Eh, mantras are useful have been around for millennia, mostly in the absence artificial ice surfaces. Our guys could use some repetitious reinforcement, our guys could use some...
Overall, I'm not really understanding when the growth we all are counting on is supposed to be happening in your scenario. When does the magical corrective on-ice work take place? Practices became few and far between during the season last year due to schedule and physical maintenance. Did we have 30 full practices in 365 days? Honestly curious.
If this were the case, guys should be on the ice a bunch more in the summers, but we've seen the trend going the other way of late. Strategy, tactics, and philosophy seem like obvious things to be studied during summers focused on dry land training. We absolutely did it in college soccer.