Events don't look that good. First of all for refinement, who in the hell decided the rate of the rewards for the refine events. You spend total 200 times refines and you only get 10 advance refine, 10000 coins, FIVE cave keys, and 4 purify total. Its bad event. Second, the lucky board is upgraded version of the old one but still I prefer the old one. Overall the events don't look very good as you say, its just so so. The only positive things is that they put new system which is good but the event itselfs are not that great. I am just saying.