Hard to say it's a downward trend when 2018 is fairly in line with 2016 & 2015, possibly slightly lower but not by a lot (have to see what the final holiday offers). 2017 is an outlier (and geez that is a LOT). Across the whole, removing the unusual 2017 numbers, it's fairly in line year after year in terms of event rewards. It will be something to watch in 2019 if we get another large uptick like 2017 or if it stays more in line with most years.
As Kaelwryn noted, though, not every year has a Lightning Returns or Yo-Kai Watch tie in either, so that skews things if you're going purely off year to year comparison.
I'll agree last year's was a bit more fun, though. And I still see people using the werewolf outfit running around.
It would be nice if this year's Christmas event offered some Japanese, er I mean Doman, flair to it for rewards. You can only do variations on Santa glamour pieces so many times, after all.
On that note, @
Kaelwryn - I can assure you I don't just toss my holiday things in the armoire..... they sit in my retainer's inventory taking up space because the Dream Boots and other Santa pieces from one year still don't go in the Armoire! T-T
The only thing that irks me about the MogStation is some of the unique outfits, like the one our pirate friend wears in the Ruby Sea. That should have totally been a WVR crafted outfit! I'm actually okay with NPC outfits being mog station items.
Mounts, I wish there were long annoying grinds to get them in game or excessive gil sinks with the MogStation being the quick n' easy method. That's the most ideal approach in my mind - make them available in game, even if it's a soul crushing grind and real cash is the quick n' easy method if you wanna go that way. Just give me some long term reward to work towards as an alternative and I'll be pretty forgiving.