TMJ sounds rough.
I think if the shakes are consisted of good quality carb sources mixed with protein and some added fats the whole thing should allow a more slow release of energy. Theoretically I don't see any viable reason why a diet consisting mostly of blender meals would be a massive problem.
But before you concoct a lot of potentially expensive and sugary blender shakes consider this one thing... Milk.
Drink whole fat milk, pints and pints throughout the day. It'll give you mostly everything you need from a supplement. If you want to get reeeeeeeal fancy then choco-milk. My first year of training I drank milk like it was water, even through my training sessions. It's really the way forward.