Anyone could have told you that more hard ticket events would happen. That's been going on for years and have ranged from very successful to being a bust. You can take your pick on everything from the Halloween / Christmas parties to Pirates nights, fireworks viewing, wine tastings, etc. I have no idea whether this event will be a success or not, but it's not a real stretch to assume they will continue to test the markets to see what they can do.
However, it's a huge stretch to try and tie everything they announce to "propping up" MM+. '74 has been trying to rally the troops to hate anything and everything about MM+ since it was announced. He's continually trying to make everyone think it's way over budget, but yet, the executives (who can be prosecuted for lying to investors) have said it's within budget. But, he spurs the echo chamber to keep up the "pay for MM+" mantra in snarky posts everywhere. We get it, they don't like it, but, they're just a vocal minority.
I see posts on facebook all the time about dozens of acquaintances going down to WDW over that past several months. In every instance, except one person, it's been popular and positive reviews. The only negative was someone that had an issue early in the testing with a door lock. Granted, that's not a large segment, but it's a very high percentage. My bet is the percentage of positive reviews FAR outweigh negatives in the general public. But to hear some (usually the same small group) there's nothing good with MM+.
Once MM+ is fully rolled out and they (possibly) start seeing the ROI they want, the same group will rally around something else to complain about the failures of WDW.