I want there to be an option in the editor to set up drafts for a league (like in the MLS). Example: Number of rounds, serpentine/fixed, max player age etc.
I also think it should be made easier to change a nation's continent. For example, say I want to move the Chinese Super League into UEFA so they can play in the champions league, that's not possible. I know it's more complex but it would be cool to be able to create your own nation without taking out some other nations. And if this is not going to work, maybe at least have the option to change the name origin type (Slavic, Spanish, Germanic, Chinese, etc.)
I would like it to be possible to add logos to clubs and competitions that you set up in the editor i.e. I created a new team in the editor but using the skinning method for logos doesn't work with created clubs.
But probably the top addition I want in FM is for women's players + teams to be included so I can play in leagues like the NWSL and Bundesliga Frau.