Customisable Uniforms for your team, the ability to design the floor of your arena which would show up in your home games in the viewer, a youth development team, new specialisations for your staff, new types of staff and league stats page (like at BBstats with salaries etc).
The basketball related eatures you selected are actually pretty good. I have no clue why at at least some on these are not in the game.
As far as the BB Bank, it's a pretty decent idea but not one that would help BB or attract new players.
Check the Suggestions they are important