Thanks for providing a direct link to the Paizo post; I'm not a big fan of RL.
The new champion seems cool. Finally they won't be locked in by alignment on top of the actual oath that they follow. Seems a bit more similar to a 5e Paladin now. But Paizo is still stuck on forcing certain kinds of character to be "holy" and "unholy", which is still very limiting. I wish they would open their minds a bit more.
They don't need to be that though. Honestly for all of 5e's flaws, I think one thing it does far better is that there is a clear distinction between Clerics and Paladins. Clerics get their power from religion, Paladins get their power from swearing an oath. Religion doesn't need to be a part of it at all.
Like, if you told me there was a class called "champion" in Pathfinder and I knew nothing else about that class, I would assume it's the champion of a cause, not of a religion.