The Pledge to Protect change is not ideal. I'm not sure I'd ever bother to pledge for 5 points. But it's good that this nerfs Consulates. If people bother to choose Consulates, it'll be en route to Scholasticism or full Patronage. It makes opening Patronage less of a no-brainer, meaning less competition for Forbidden Palace.
That all being said, Patronage is still a bit too weak to consider completing, when weighed against Rationalism. So, basically we still have the first tier Policy Trees, the ones you complete (Tradition, Liberty, Rationalism), and the 2nd tier Trees, the ones you dabble in (Honor, Exploration, Commerce, Piety, Aesthetics)
My biggest dissapointment is that GS, GW and GE are still not based on 8 previous turns before spawn. Saving GS to rush through Modern and Info is lame. Saving GW to rush through multiple policies during a golden age/World's Fair is lame. GE is often saved as well, so human players would be much more likely to plant GEs if they didn't have an immediate need for them, which would make manufactories less irrelevant.
This one change would get rid of some of the more exploity-feeling strategies in the game.