Sorry we took so long to reply, we’ve been hard at work on our next update, and I haven’t had much time to check the forums in the last 2 days.
Couch Coop would be fun, I agree!
We had it in our previous Puzzle Quest games, and it was quite popular.
We develop the Mobile/PC version here at Infinity (505/Pipeworks develop the console versions), so this isn’t an authoritative answer… but I don’t believe it’s on the immediate list of things to add on console. Longer term, we’d love to see it though!