You're spot on. Look at liverpool: they combine one of the world's best DMs(Fabinho) with two quick, fast, energetic and disciplined runners who are decent on the ball and strong in duels and 50/50 situations, and then they have Mane, Salah, Firmino up top, two of the world's very best wingbacks in Robertson and Trent Double-Name and the best CB in the world, and arguably the best gk in the world too. Thus proving that if you have 8 of the very best players in the world at their position, you don't need the other 3 to be more than above average, good players