Feedback: your recent changes are all awful

Retiring tacos or maybe not?  OML nerf because he's the most commonly owned 5*?  I'm not so upset about the vaulting, but you really could have done better to address the availability of old characters.

And dropping the minimum points for PvE is a bandaid on a bad scoring system.

So here's my suggestion: maybe start adding some content (characters don't count) and fixing things that are actually broken and people will be excited to play and spend on your game.  Just a thought, not sure if you considered it.