I'd love to see this too. Carrying over Career Mode saves between yearly releases would make the mode feel much more meaningful.
After spending dozens or even hundreds of hours building a club, developing youth players, and creating a long-term story, starting from scratch every year is disappointing. Even a simple save import or EA account cloud transfer would be a huge improvement.
It would be great if EA considered adding a Career Mode carryover feature in future titles, similar to how some other sports games have handled save continuity in the past. It's a feature many Career Mode players would genuinely appreciate.