This year's Christmas event, overall, was pretty nice. Based on the constructive feedback template, I'd go with the following, explaining why later on:
Enjoyment: Enjoyable for those who are looking for a challenge, or like puzzles/riddles and so on. 7.5/10 for me, because the spawns made up for it mostly.
Quest Difficulty: 5/10. I didn't really have much of an issue with the whole thing, only when you had to come back all the way to the superboss if something went wrong. My piece of advice, to help newer players is to make trainer pokemon level scalable with party level (without knowing if that's something PRO has the tools to achieve) (for example, if the highest level of Pokemon in your party is 50, make the trainer's Pokemon levels 50 or so) so that it's the same enjoyable for everyone.
Story/Lore perspective: Not familiar with the original storyline that much, will go with 7.5/10
Effort/Reward Ratio: 8/10, the free rewards for x-mas could be slightly better in my opinion.
On a sidenote, I understand that getting money out of the economy this moment is good (hence why staff auctions were held), but the entry fee each time to Matsuki was a bad idea, in my opinion. Too many dailies to do, sometimes you have to meet elsewhere to do a trade and all these reasons made people hate the fee, myself included. Happy new year and good job!