I think pretty much everyone on here would agree that if the 3 players mentioned are all playing at the top of their game McKenna and Devlin are better than Considine. However based on form this season so far and for the most part of last season Devlin has been poor and McKenna nothing near what he was - it could be argued that Considine has been at least as good as them if not better (not a great achievement).
Reason Clarke would call up Devin over Considine is age and potential - he’s trying to build a team for the future - Considine is too old, even if he has been better than Devin this season.
I don’t think Considine is good, but that’s my take on it trying to be objective.