Yes, the 2015 factory FE 350/501S seat is revised with really nice materials and different foam but this time around I was not willing to wait a year for it to break in, and learned the same on my Beta 450. Actually, the new seat is not "bad", it's just the alternative is so much better.
The Seat Concepts Standard Comfort seat is so much (drastically) better seat support and way more comfortable than a '14 or '15 Husky, KTM, Beta seat. I will never to back to a factory seat after this. If you are on your pegs most of the time, probably does not matter but when you ride 70 miles back and forth just getting to offroad trails, the extra width (now 8" rear) makes a big difference. I never think about the seat on those 250+ mile day rides. The only thing I regret about the seat is I should have bought one for my former Beta sooner, waited too long and did it day-2 on the new Husky.
Shortly, you'll be able to buy the whole seat and pan new vs. sending yours in/back and dealing with shipping, and you get to keep your factory seat too...
A few photos right before I bolted it back on.