Champion of Irum indeed hasn't had his change applied correctly. The health is now capped to the maximum of 2 allies, but his attack isn't.
Also, I was playing a match as Eladwen against an AI Elementalis who used Transference to steal Artful Squire into his hand. He later summoned it, and it buffed CoI as it should, however, when I eventually killed AS, CoI's stats didn't change. They did get reduced however, when I killed one the AI's Infernal Gargoyles later on. I think that this might have been mentioned already, but I'm not sure.
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