I don't even care for most mobile games but decided to try this one out because I'm a huge HP fan. It's really fun, there's a ton of stuff to do, combat is enjoyable and very customizable. It feels like they are fairly generous with the free items (though I have definitely spent more money than I indended already lol).
They will clearly be extending the storyline as time goes on. Not sure what they plan to do after year 7 though.
Performance is okay but not great, I agree. I get quite a lot of stuttering when loading in new areas, although it smoothes out after a few seconds. I haven't noticed missing buttons glitches like you mentioned on a Pixel 6 Pro.
I do wish my social club was more active, it has 50 people but seems most of them stopped playing for the most part. I can never find anyone to duo with. I'm on Opaleye, LFG