It'll make him feel better. Because Akin can understand secrets, given the level of mind-fuckery Judges have shown themselves capable of.

And just... well, he can't expect Jace to explain everything of magic he knows, any more than he can explain everything about botany to Jace. Especially since most people aren't used to absorbing info via mental link. So some things are a matter of 'do it on your own and tell us what we need'. But major decisions need to be explained and agreed on.

(Also, Akin wrote a list of games he remembered in the team journal. OOCly, I skipped a few loser games that he might not have known about, but he'd probably show it to Jace.)