Thanks a lot for your advice. I never aware above phenomenon.

I do not so actively manipulate sp of players as you do, except holding sp of players so as to attract negotiation offer like above case.

My team often start new seasons with weaker starter qualities comparing with many of my opponents. I rely on fast quality improvement of many fast trainers to catch up the difference. Usually I have better second half seasons.

But I fully aware of the difficulties of selling players who are just added a new star. I have this in mind on buying and selling players. I will consider adequate types of players to be acquired in different points in a season.