There are lots of features of fan art on the official FB page, they hold art contests from time to time there as well. With the forums mostly dead, you can't expect as much attention towards the sub (though it's still doing much better than many other subs thanks to passionate players), but I can tell you that watchers are watching and artists have been rewarded for their outstanding art that had been posted on the forums, even as late as half a year ago.
How is the guild delta different? What could affect your score apart from those things you listed?
The biggest difference comes when you sell a gem/a gem gets autosold. In this case, your leaguedelta will go down/won't change, whereas your guild delta will stay/increase by the value of the autosold gem.
When the Ricochet is disabled, it keeps bouncing on causing it to get to weird angles. It's a known bug that has been around for 2 updates now I believe, luckily it doesn't effect the gameplay. Hopefully it gets fixed soon.
It's probably a replay glitch. Replay glitches tend to happen when the raiders use the gang of thieves potion, and they cause the replay to be messy with thieves jumping through traps/never show a completion of the base. It's a known thing, so there's nothing to worry about.
Players who logged in after the update was installed didn't get their UGs. This happened last time to some players when the heart UGs were around, and iirc they got their UGs after they messaged support through the in-game help section, so that's what I would recommend.
I appreciate the effort you put into this Alucen, I really enjoyed solving it. Adding some true/false statements was a really nice touch as well.
And the answer:
Roopa used the ghost potion to steal a yellow deep golden gem, which got him 2nd place in his league. Missy used the double gold potion to steal a blue small spiked gem, which got her 5th place in her league. Lady Painsworth used the disable trap potion to steal a green mine gem, which got her 1st place in her league. Auric used the gang of thieves potion to steal a purple deep spiked gem, which got him 3rd place in his league. Emperor Filon used the slow motion potion to steal a red baby golden gem, which got him 4th place in his league.