Miracle Time Possibly Rigged?

I don't have the specific numbers right now, but I used a combination of (mostly) red and black cubes, 230k nx in total-- only 2 tier ups from unique to legendary.

EDIT: I decided to stop there as it wasn't going so well. I suppose I too will wait until the purported "revamp".

EDIT 2: I used 180 red cubes and 37 black cubes in total.