Why buy players at end of season ? its waist of money right ?

[Broxburn Rovers]

Ive been buying players for the 1st time at the end of season, all 4 star for 1 token as they'll improve my subs and overall team for the start of next season. my 1st team is currently full of fast trainers so my subs were struggling to stay about 2 stars for next season so i think ive saved alot of tokens an can avoid bidding wars at the start of next season.