I understand your point of view, but I think there will be choices that don't make sense.

Dani Alves hasn't been competitive enough for 2 years to deserve a place at the World Cup.
Even Fred these last few years he never managed to earn his place in Manchester United's starting eleven and he never showed an above average level of exhibition. However, there are several players who play in the Brazilian championship who have shown a high level, having played in all the most competitive competitions.