I can tell from your pictures that you are carrying quite a bit of body fat (especially looking at your cheeks, neck and arms). Even models don't get those lines on their face until they are very lean.Thanks, I agree with what you said about getting more midface projection. In regards to what you said about the dropping the gonial angles -- are you saying it wouldn't look good to have lower gonial angles without a more compact midface?
I would first try to get as lean as possible and then evaluate whether you need to revise the midface implants. You could get filler on top of your current implants to see how it would look before committing to a revision.
My opinion, if you care, is that that your implants are great and you shouldn't revise them. They looked super prominent in some of your earlier pictures when you were a bit leaner, and would look even better if you lost more fat. 8.5 mm would be way to big for a cheek implant and you would definitely look overstuffed. Facial definition is a combination of bone structure and leanness, don't try to compensate for a lack of leanness with oversized implants.