I experienced a small glitch in Auridon, the ground seemed to lose texture after travelling from a wayshrine in the north to the Vulkhel Guard wayshrine. This happened each time I did the quest.
The crown was an alright reward, can't complain. The cherry blossoms are MUCH a better reward than those annoying mudballs that the trolls spam.
The epic level firework that left a jester hat in the sky would have been much cooler as a memento than a consumable.
The furnishing banners popped up as a reward too often, I ended up destroying a bunch since I didn't really like them anyway, and they clashed with my other furnishings lol.
No problems finding or completing the quests, however the dungeon delves felt like dungeon delves, nothing special, to be honest. I enjoyed the bit where I was setting off fireworks and sprinkling blossoms on people lol, that was different enough to be enjoyable. The other, basic, fireworks were about as spectacular as a sparkler, I just destroyed them because they were taking up inventory space and I didn't have the patience to sell them.