I did get to take that short test drive a 2017 F-450 Platinum the other day that was loaded with every option Ford offers. Didn't get to drive it much, but could get some comparison to my dad's '08 H&S tuned/deleted F-450 Lariat that I'm used to.
Drive and power: The 2017 rides much smoother and is super quiet in the cab. I thought the '08 was pretty quiet before, but this is even more so. The '08 also has the extra heavy duty springs. Not sure if the '17 did or not. The adaptive power steering is kind of neat and you can feel it stiffen up a little if you start turning a corner and then start accelerating. Basically for slow speed maneuvering you don't feel a thing, but the more aggressively you drive the truck the more it stabilizes itself. The truck overall is stiffer. Not in ride quality, but in flex. Near zero body roll going around roundabouts at a pretty good clip. Turbo lag is gone and the power is super smooth. The tuned '08 feels like it has more power (set to the 250 performance setting for those familiar with H&S), but the '17 is much more manageable and less touchy. Builds in a very linear fashion without a turbo spool hit. I'd compare it to maybe the 250 tow tune on the '08 or between the tow tune and street tune. H&S has +150, +250, and +300 tunes for the 6.4 with stock, tow, street, and performance within each of those for reference. Brakes are very strong. The guy told me overall this truck weighs about 50lbs more than last year's f-450 since they stiffened the frames and running gear after going aluminum on the body.
Interior: Head room is improved from the 2011-2016 generations which I am a big fan of. I can't sit in a Ram without my head touching (sun roof or not) and a 2011-2016 Ford with a sun roof is a no go. The 2017 had a sunroof and it didn't bother me in the driver's seat. Back seat sits higher and It would still be a no on a sunroof for me to get the extra 2" of headroom there. Rear underseat storage is lockable with the truck key so you can't fold up the rear seats and get in there. When it is all folded down it only sits maybe 1/2"-3/4" higher than the rest of the floor board. Massaging seats are pretty sweet! Does the butt and the back. Might really put a guy to sleep after a hard day of sledding with heat and massaging. Steering wheel was power telescoping as well as up and down. When you hit the door handle it automatically moved itself up and in toward the dash to get out of the truck. Bucket seats are 2" wider and fit me much better than the smaller '08 seats. Seat comfort overall is better both front and back. Front seats are better than 2011-2012 trucks I've ridden in too. There were so many cameras on that truck you could literally drive it and never look out a window if you wanted to. I noticed the front of the hood is sloped down more so the view out the windshield in-front-of the truck is less obstructed than recent years.
Exterior: These trucks look waaayyy better in person than in any of the photos. I didn't really care for the look before, but now I don't mind it. Rear tailgate assist is nice both opening and closing the gate. tailgate step is completely hidden compared to past years and the tailgate surface is completely flat like a truck that didn't have it before. No reason not to have it now.
For the short drive I was overall impressed. I better have been for the $89,000 sticker price on the truck I was driving!