I had this idea in my interaction wishlist, and I think it really needs to be included at some point. ATM when you leave a club you become 100% disliked by that club, no matter how long you have been there i.e. 7 days at Spurs = 100% disliked, 17 years at Spurs = 100% disliked
The option to give a reason why and when you are leaving would be perfect to counteract this e.g. "Maybe it's time for me to step aside and let someone else try and take the club to the next level", "The board have stalled on a new contract and the insecurity means I feel I need to leave now", "The board don't share the same ambitions I have for this club".