I actually agree with most of this. It definitely seems to be in Elias's nature to hold onto guys as long as possible and to be extra sure that a prospect is dominating at a level before promoting them.
He also was on record recently as saying it does no one any good to let guys just mash in the minors for long periods of time. So we will see. Kjerstad has seemed to cool off significantly since the Tides stopped playing against Charlotte. So he probably does want to see more from him.