I don't mind that these missions pop up over time. Actually I quite like a surprise like this every now and then. I found this quest yesterday really enjoyable. First discovering the quest when I visited FWC. Then getting the clan together to do VoG (man we had a giggle, dusted off our old fatebringers and gjally) we were still all in party chat when we did the single player mission and confused ourselves with the spawn off the chest on twilight gap) It was good fun and mixes up the weekly routine. I want more of this stuff in the future, even if it's just for random legendaries as a reward. Or maybe even just a high light blue one (I need infusion material)