To be fair, they only did them on RoF and FFP in 2019, not FFP+ and UFFP. It was a very small discount already.
In 2019, RoF w/Express was only $20 off and FFP w/Express was $15 off for Passholders. They were already in the process of phasing them out.
Multi-night tickets are a great deal, regardless. People on Twitter and Reddit are complaining about price increases. I'm not sure how you can be upset because a FFP+ is no longer cheaper than any combination of a Thursday and Friday single-night. It covers 35 nights. The break-even shouldn't be at 2 nights. The demand is rising and they only have so much capacity in the parks, especially in the current climate. I actually think they were too cheap before, FWIW.