DON'T DITCH THE HITCH!!!!
Keep your Fastway, it is a great hitch. If your WD is properly set up sway is non existent.
My truck is about as HD as you can get, F350 Crew cab Powerstroke and I won't tow without my WD hitch.
I have towed our 26' camp trailer with my F350 both with and without the WD hitch (Fastway E2 8K square bar). It makes a marked difference and tows much more securely and stable with the WD hitch.
"Sway Control" is merely a cover up for improper weight distribution, it's masking the symptoms of the disease.