as player`s get older they will slow down so just keep and eye on the training and yes value will down but if you get couple nutter`s bidding then you can just as much,
what i do is save skill point`s over the season then wait till i see new league and add but only after i`v renewed contract`s as if added before i renew then it would cost me more to sign on, at the moment all my player`s are 1 skill away from 6star ( scout ) but if added now then they would 7 star and world class but as i`m top of league i`m saving for new season if was doing badly then i`d skill