I personally think that spending tokens on changing players names to improve performances, does not make sense, it should in theory make no difference to how he plays, I would like to think that Reals team is just coincidence, If you do try this please post your findings,ie how many games he played better for?. I give the player a season or so and if he is a slow trainer, constant low ratings etc, I would wait till he got to a 1 point short of another star then sell him as this gets the most price and only I know he is useless lol.