I think people expecting Fender to completely change their developmental cadence in response to Stadium or any other new competitor. will always be sorely disappointed. They set up their team to adhere to the "six-month sprints" model, and you can't just tell them to hurry it up in order to try to beat a product to market with 1-2 features or because people can't wait for X "must-have" amp.
The content on TMP is actually pretty decent as-is and versatile: Some nice convolution reverbs, both standard and cloud/ambient-like. A (somewhat wonky, but still neat) feedbacker. Most meat-and-potatoes amps are legit. I tell you, I was closer than I ever thought I'd be to making it my primary rig before Stadium was announced. It's certainly fun as hell to operate, and has a great form factor.
That being said, I decided to move on because I got tired of the clunky "Scenes" mode (which was barely used in any factory presets), limited routing flexibility and because Stadium definitely fit the vision of what I'd hoped TMP might evolve into pretty much from the jump. Someday, they'll add on a synth, get a lot more of the amps people want, and then...people will give it another look in disbelief at how underrated it is.
From what I can tell, Fender has a long-term vision for this and a good team in place. They should stick with that.