If you are going to have a facelift after FFS, I would say it makes sense to keep using the same surgeon or the facelift specialist in their team as long as you are happy with the first set of surgeries and there isn't a big difference in price. If somebody just wants to get a facelift alone, I think it makes no sense to use an FFS specialist.
I still don't need a facelift because of my age, but when the time of needing one comes, I am sure that I will use the same surgeon who did my FFS, because I am very happy with the results, and he already knows what's underneath the skin and he has a soft tissue specialist in his team.
Something very important, generally speaking a facelift done before FFS would be a waste of money, no matter the kind of surgeon. This is something that an FFS specialist will tell you, while a regular cosmetic surgeon won't.