It's not the emphasis on Anakin, it's the emphasis on his "destiny" as opposed to who he is and what he does.

The OT had an emphasis on Luke, but it was about who he was and what he did, not what he was destined to do or anything. He learned and grew as a character as we learned and grew as an audience.

That doesn't happen with Anakin, which is the problem. The prequels are too event-driven, so the characters take a back seat. It's the other way around in the OT, which made them so memorable.