I think it would be great if there were a way to upload custom logos and kits onto the site for tracking Create-a-Club career modes or modded Career Modes with custom teams or kits. I also don't believe it'd be very hard to do, considering you already have a method of storing user data (however you store Career Mode files), and there are only minimal branding assets used on the site (just the logo and the minikits). The text-based information is already being read from the file, so those are the only two other things that would need customizing.

Regarding the ability to upload our own files, another excellent feature would be the option to upload screenshots of the game or custom avatars for generated players who don’t have minifaces. Since I'm already modding my team branding, I've put in the effort to create custom minifaces for each of my generated players. It would be amazing if there were a way to display those here as well.