There is a recurring discussion around Crouse/Peterka and I see both sides of the argument. For this team right now, I agree with you. Crouse adds playoff style with 80% the production still and JJ will likely be more expensive starting next year.
I understand that Utah isn't looking to move Crouse, but I don't think it's impossible if we're willing to overpay.
I did exactly that in a franchise mode Armchair GM that I'm too shy to share, but maybe tonight I'll post it if I feel like getting flamed