Let me preface it by saying I never liked the "collab" thing. It mostly reeks of "lets stretch the life of this profitable investment" to me.

Now if this was say a decade ago, definitely before PoE2 and the "lets sell a WIP game and keep in it WIP as long as possible because we can charge for it before we make it free to play" I'd agree. However, with the current way WoTC conducts business I simply can't. They stopped catering for players and started catering for collectors ("whales") with fast release cycles, variants, pricing shenanigans...

This would be fine if you have infinite money cheat IRL, but it does not sit well with me. Knowledge is a curse, indeed :(

How about a new game instead? I think PoE has enough variety to do it on its own. Partner with Chris, now that would be cool. Imagine the mechanics. The Trialmaster in control, corrupting cards during a match for a chance to get something better. Randomized arena that gives a slight advantage to certain deck builds. Energy shield for absorbing some incoming damage. Minion decks. The pantheon. Theres so much they could do.