Pie in sky improvements I'd love to see

[BroMagnon]

I'm sure you'd be the first to line up to customize your home grounds.

[Accyrover]

I'm sure you'd be the first to line up to customize your home grounds.

If that was directed at me, you couldn't be more wrong, the upgrades other than medical and training have little benefit.
With good financial management $$ are of little use in the game so big fancy stadiums are way down my list of priorities.
Besides apart from your self who looks at stadiums, the only time they are of interest to me is in the transfer market for accessing token buyers.