its a loose definition but i think if a player couldnt just slip into another team (assuming they have same role) they would be impacted very negatively
for example suygetsu overpeeks a lot and is given freedom to kinda do whatever, the team dynamic and having ange1 igl helps him a lot. he would still get a lot of kills in other teams tho cause his aim is just rlly good
tenz is kinda like suygetsu, hes really good but i still think hes kind of a system player because many would struggle to play with his playstyle, second entry omen. i think its unique and most of these players are unique star players who have a lot of freedom and have teams built for their success