Yes, I absolutely think SyFy should have a second season of Haunted Highway.
Jack can open the show stating about his M.S. and he will pick two different teams each week to see what they find. (Personally, I love Jael and Devin, but we know they do Fact or Faked) Hell, why not ask Josh Gates and one of his team members on one week, and Steve & Tango (Ghost Hunters) Or, Joe and Susan(GHI) etc.....
and on the weeks he is feeling well enough to do so, let him.
I think even if Jack can't do the investigations, he should some how stay a part of the show. It will not be the same without him. This is a great show I would like see continue.
As it stands now, I'd jerk it off in a heart beat. SyFy has plenty offerings of quality material, which this "show' wouldn''t quality for. Some things don't deserve a second chance, like some of the shows on SyFy.