Yay is better than Cryo for sure, Cryo is great and its not wrong to label him as having a crazy high ceiling, but how much higher is his ceiling compared to what Yay has already done? I'd argue what we want Cryo to be is what Yay is.
At an IGLing standpoint I see Vanity as having a higher ceiling as both a fragger(look at this years LCQ and past tournaments) and as an actual IGL(lead two different teams to international success)
Leaf IMO has an equal or higher ceiling than Asuna. People forget he's still younger than Asuna and has more potential to flex. Asuna Raze>Leaf Raze but I trust leaf more on Jett if he needs to play it, plus he seems likely to be a star on sentinel agents. Asuna is still crazy and IMO they're 3a and 3b when it comes to potential between these teams.
Bang I think has the highest ceiling of the rest of the 4, but I'd say Xeppaa and Zellsis are 2-3. I think Derrek is great and currently on Sova which is meta he's above Xeppaa, but I think Xeppaa for sure has the ability to get ahead of him, and I personally think Derrek has shown to be fantastic but IDK how much better he's getting.
And lastly I think mCe deserves to be praised more than Mikes and took the Guard to higher success than any new team and coach ever had. He did that with an objectively weaker roster, which is why I have such high hopes for a C9 team that has pretty obvious team chemistry(only rivaled by 100T likely)