Seriously, though, why was 50/50 Vaulted 4* ended?

No! I don’t want the new shiny anymore! Rockett pointed out that anyone in the 5* tier barely looks at the latest 4* , much less using them for anything significant.

Sure, for people that are 4* tier and who don’t want to go to the 5* tier this may be more interesting. But even for many of them, their highest level 4* from the vaulting period will have a significant level difference and be their go-to for a long, long while.

Regarding pack sales, it used to be that the new 4* could be found exclusively in 40 packs for their events. They were, in fact, the only 4* in there. The chances of actually getting one was pretty high for this game. (Probably why they killed it) By comparison, an 80 token vault with one cover, or 4x odds in a 40-pack with 65+ other 4* are a better example why people stopped buying them.

I agree with this. I’m not going to say there’s no chance Dormammu is right, but as I said - it’s very difficult to spend money on 4s and for a 5 player it’s simply not worth it. If you’re looking for that transitory advantage, you’re much better off hoarding/spending on a new 5* when it debuts and getting the 4 weeks of having them boosted.

You’re assuming these vaults are being catered to those players. A large percentage of this game’s players are not 5-star players.