But..Party Becoming 4's biggest hit.
I think so because it gives a clear message.
Just Have Fun & enjoy the music.
Which is exactly what Beyonce has been stating she wanted to do this era.
People(some) were just confused at what exactly was going on with 4 & couldn't recieve a clear message and join on the 4 train.
But Party gives the exact vision of what the era is about,or possibly how Beyonce feels.

Hard to explain a bit.

Well.
Let's see in the long run.