Foden will likely never reach Iniesta's level, because the Spaniard is the best midfielder I've ever seen. But Phil has the ability to be the best English midfielder. No doubt.
Alves is probably the greatest right back ever. Nothing more to add.
The Busquets one is difficult. As a pure DM, he's the best ever. But Rodders has more to his game; he progresses the ball forward more and has a rocket I never saw in Busquets.
Pep's Barca is the greatest club team ever. But Pep's current iteration of City aren't far behind, and who knows how better we'll get after slight evolution.
I agree, it's not trashing our players. They have skill sets that are uniquely theirs and will leave legacies that are uniquely theirs.