Whereas I certainly experienced the whole drought of one hour, no drops a few times, due to it being non-challenging content it was certainly possible to just catch up on some decent TV (Killjoys/Dark Matter!) and movies on Netflix whilst bombing around the zones.
I kept track of the number of FATEs I'd done for it using the achievement page (not enough to get the next tier) and it ended up averaging about one drop per four FATEs (under 1,000 FATEs in total). That knowledge kept me semi-sane, but there was no way there was going to be a missed seasonal achievement on my char.
I guess it also helped that I had some low-level jobs that I'd never had the motivation to level up. It was frustrating whilst doing it, but never enough to stop me from seeing it through.
As for the event itself, I was bemused as to why we've got a promo for a non-SE game. It's one thing to take other FFs and smatter them across Eorzea (or even DQ), but this was just odd. I hope they do a Transformers crossover next year...
And yes, there could have been a much more interesting way of doing it than farming FATEs for medals. Having you Yo-Kai watch beep when you were in an instance (only 1 in 4) with a Yo-Kai hidden in it (just in an area that you may not normally look) so you had to go and search the place once the dungeon was complete (or on the way round if you were solo unsync'd) for a medal. Each Yo-Kai keyed to certain dungeons all the way up to ExR dungeons.
Well after being put through it, I swore off ever buying Yo-Kai products (I only had the free demo on my 3DS), but after finishing the event and looking round my house, it seems my kids have Yo-Kai watches and discs and an app and cartoons downloaded, so maybe the marketing ploy wasn't aimed at me, but the people in the room watching me play!
At least it's a new club they've started up at school...