Practicing against mid GC teams and teams that are just trialing players won't make them better. If anything, it would just make them worse. They need to bootcamp in Europe or Asia to scrim legit teams like PRX, DRX, FNC etc to actually get better.
Ehhhh I disagree. Depending on how hard they are gonna be practicing, I fear that it could cause burnout way too early in the season. I have also learnt from my mistakes time and time again, I am not putting any expectation on Sentinels until I've seen them play an official match or two together.