If your 15 Ford has the FW prep, I would go that route, changing to a puck system hitch.
Otherwise, if you are happy with the hitch/trust it, I would continue using it. Most will not load their FW to GVWR, but you know if you are the exception.
I upgraded my hitch that I'd had for a number of years, when I bought new truck. The old one had some wear, but worked good. The new hitch is better, more user friendly. I'm glad I upgraded!
Jerry