The idea about the achievements is very interesting. It would surely add a lot more fun and incentive to play a lot more (although it stops me from playing really bad hahaha 😅).

It would also be nice to have seasonal achievements, so you can get them during the season and then not anymore. In my mind I can think of a kind of badges that you can see and when you pass the mouse over them they turn around, although this would require much more elaboration.