Just a few things I've noticed so far, I've only been playing maybe 20 minutes, keep in mind.
A few hundred days in and I haven't won a match, I don't see any indication of how I'm supposed to win matches, what the skill levels of my opponents are, the odds of victory, etc. - I feel like this would be a good thing to drive forward the idea that you're making progress, if you see more than just a vague-ish "Skill" stat. Longer term, once you're further down the road obviously, I'd love to see some sort of championship and rivalry system! Maybe give the players the option of working up a ladder, and even further down the road, add an option to lock into/jump from promotions to rival promotions. Just spitballing, really!
Oh, actually, one more, you should absolutely add a very expensive DDP Yoga equivalent to up your max health. Money is kind of meaningless at a certain point in the game right now, so having other options like that, a "change gear/gimmick" option that can reroll your fan stat a bit, etc., would be neat.