For me the biggest pain was destruction of negotiation. They so screwed it that i cant understand why they did it. They can easily remove it from game and noone will see that it is disappeared as it was with assistant manager .
Yeah you can wait all day when trying to sell player - with no luck. So i usually just sack them nowdays.
Special sponsor - even if it gives small boost to us but the biggest advantage is for those who pays for them. You just cant overlook differences between common and paid special sponsor.
So next time anyone will request any changes remember that it will be twisted in that way you cant imagine.