Joanna Geraghty said this about TrueBlue in their 2021Q2 earnings call:
My expectation is that they turn TrueBlue into something like Alaska Mileage Plan where customers have an incentive to earn/transfer points and book travel on partners.
I'd expect that Mosaic will receive a redesign at some point as well, if only to make folks less likely to just jump ship to AA once reciprocal benefits are announced. The issue is that there's less stuff onboard to offer compared to the legacies, since B6 does not have "preferred seats" or domestic F beyond Mint.
No doubt that Alaska plan would be a great one for them to learn from. Seth Miller has tweeted several surveys that JetBlue sent to him regarding improving mosaic. IMO, it's been quite evident that certain plans (like the Alaskan plan) has a lot of stickiness and that's what B6 should be copying should. Of course, a lot of that will require some serious IT work, which has always been JetBlue's Achille's heel.