This is pure conjecture on my part but could the age of an SV make a difference ?, my 8x32 was purchased as mint used from SWoptics, and as I`v posted before the veiling glare was truly dreadful, however I have no idea how old it was, I think the SV launched in 2010 so it could have been an early example.
Could Swaro have updated the baffling in the SV before they rolled out the FP due to the numerous complaints of poor stray light control ?, and could this be the reason some find no issue with glare in their examples ?.
Getting back to the OP`s question I firmly believe the FP offers more than a cosmetic upgrade, the focus action is very much better than any pre FP I tried, the tension is all but identical in both directions now and mine is buttery smooth, the best I`v tried on any SV, the change in armour also means that Swaro have fixed the problem of the focus catching against the armour in very hot weather, ( rarely a problem around Dartymoor ), which has been reported, the armour is sculpted and reduced in thickness around the focus wheel.
The locking diopter is a welcome touch, as are the attached objective caps if you use them, the rain guard is now flexible rubber rather than the horrid hard plastic articulated thing that came previously, also the new cord strap makes it hold out of place when using the binoculars much better than the earlier one did on the more usual web strap that was in use.
In fact the speed with which the strap can be taken off and put back on with the FP has totally won me over, and the 360 deg rotation makes me wonder why no one thought of it before, spend a few days with this system and I`ll bet you won`t want to return to threading a strap through lugs, rain guards and strap locks ever again.