Even "phases" are an individual surgeon and nutritionist thing. You would think they would have come up with a consistent plan for post-ops, but no such luck. Nutritional programs are like religions, surgeons & nutritionists have their beliefs that they will go to their graves to defend. They are as important as life and death and every other plan is wrong. Your surgeons' plan is the path to success, everything else will lead to failure. Get a couple drinks in your nutritionist and they may admit the ultimate truth: that it is consistency in a healthy plan that is the key to everlasting... err... maintenance.
Since you mentioned shakes, broth, jello, pudding, and scrambled egg I should think anything with similar consistencies would be OK. Perhaps mashed potatoes, yogurt. I think you could probably get away with pureed just about anything protein or veggie. Basically, anything similar to what you are doing now. Likewise if your surgeon mentioned any goals or types of food for this period you could do things that would also meet those goals.
Good luck,
Tek