I join in agreement with my colleagues in discouraging you from undergoing this procedure.
I have seen 10 year old children having the appearance of a "falling cheek", does that mean they should undergo a ribbon lift?
Any surgery carries risk. With that risk comes a judgement of whether the risks are worth the benefits. Clearly, we as professionals, concur that the risk (given the relatively minor problem you complain of) is not worth it. How would you feel if one cheek settled differently from the other? Would you be willing to undergo a revisionary procedure? None of us would rate your degree of aging as sufficient to merit surgical correction. Now the other part of this decision making process, we think you look great now but how much does it bother you?
If you find that this sufficently occupies your thoughts, you may want to consider a camouflage procedure such as a filler along the junction of the cheek and eyelid (the "tear trough") to try out the look.
In regards to your inquiry about slowing the aging process, this is speculation and I am not aware of any study that would support this concept.
