Rick and Karen, chances are there is no difference between the '15 & '16 F53 Ford chassis or the components/add-ons by Jayco.
But, having said that, you might want to take delivery and put some miles on it before you begin adding components. There are Precept owners on here that have not had to make any adjustments to their units.
Our early '15 model 31 UL had handling challenges from the start. We added a Safe-T-Plus front stabilizer bar and then a rear trac bar. I wish we had added the rear trac bar first because that changed the handling characteristics dramatically.
Safe-T-Plus has been using the same steering stabilizer on the F53 (19.5" tires 31'-34') chassis since 2000 so the possibility is the 2016s will be included.
I spoke with them on the phone before I ordered mine and they were very accommodating.
Good luck and keep us posted.
Darrell and Mary