Some ideas for the game are:

1) More Special abilities with better visible effects. Stuff like long throw, tackle expert, long shot (keeper)
2) A better way to spend your money later on. Specialised trainers for your attackers. Workshops for your team for a good cost. Extra investments around the stadium with extra buildings (bigger roads/train station/hotel/restaurant)
3) A way to spend your money on brilliant players for a very steep price. Recommenced players cost 120 mln and 79 tokens. If you pay the manager big money you could get the player for 59 tokens but triple the pay.
4) Invest in other stadiums and other teams. Scout players over there.
5) Transfer system overhaul. Less tokens for Nordeus but more for the player. If you go as high as 6 tokens for a player you are actually paying something like 20 tokens for a player. Totally not interesting. Also make it possible to put a player on the transfer market actively to get a more lively transfer market.
6) Pay a manager to find certain recommended players more. For example, you want a MC with playmaker ability and you have to pay the manager for a higher chance at a player like that .

Why do I suggest this? I am swimming in money and I can't use it on anything anymore which makes the game boring. Win bonus always on max and still no money loss.