If Google's really trying to enhance user experience, the first thing they should do is stop giving so much weight to domain authority.
I was searching for a specific answer to a specific business related qiestion, and the top 5-7 SERP positions were dominated soley by entrepreneur.com.
I had to dig into the 3rd page to find my answer from a far more obscure (but useful) site.
Why?
Because Entrepreneur.com provides vague, watered down info half the time. But because they're an "authority," they get the privilege of cluttering the SERPS with fucking garbage. Fuck daught nugguuuuh.
We need more diversity in the SERPS, gotdammit.
That has been my basic frustration with Google as a search user for quite some time.
As far as ranking changes for what little I track I don't see many changes.