This is not an issue in my opinion. Pools does not represent a single entity. They are composed by a lot of miners, right?
Discussion
Marty Bent has a podcast on this subject today with the title Bitcoin Mining Pools are Critically Centralized. His guest is a well known bitcoin developer. I haven't listened to it yet but it's in my dowloads. Here it is if you want to check it out:
https://primal.net/e/note1ntrlr3ueex53qdeg3wzyghfwz2rsj38kgk5lh33nsk4nfdl6spusnnafty