Dropping the bronze/silver/mythril/gold astrarium requirement from 25 to 5, and allowing them all to be redeemed for the next higher tier would be a nice step towards making this event less of a kick to the balls.

Get to 100? Nice, here's your instant HQ piece. Can't quite make it or RNG having funsies with you? At least you can still work towards HQ gear in a reasonable amount of time.