Correction on my surgery date: it is September 6th, not 4th. I'm currently doing the 4-week pre-op diet, limited to less than 800 calories with greater than 90g protein. I've got this!
I think your pre op diet is awesome! It will really prepare you for life after surgery. I think the liquid diets are unrealistic. They make you hungrier and no one drinks liquids forever. Rooting for you!