It feels like the general consensus is that people don't enjoy the game modes where they demand a large time investment but potentially offer no reward.
I personally have no issue with conquest or mini seasons, they are perfectly fine. I enjoy the short format and the constant rewards make feel worth the time.
Diamond quest has potential if they dive more into the rouge like aspect of permanent boosts allowing you to feel like you have made progress even if you loose.
Showdown needs a major revamp. Spending stubs to enter to potentially leave with nothing after a sizeable time investment just isn't fun. There needs to be a tweak to the reward system to make it feel like I haven't just waisted an hour doing nothing but batting.