i sometimes think people don't understand the difference between a downgrade and just something being changed. there is nothing technically worse in the new trailer of god of war. if anything things have improved. they're just taking place in different lighting conditions and with different atmospherics.
it's like when people kept posting this ridiculous comparison of uncharted 3
they re-shaped chloes face and moved the entire scene to a new location where the lighting and atmosphere was completely different. geometry and textures were not "downgraded" the scene simply changed. was a it a good call? debatable. but in the context of the story and location the scene takes place in, it makes a lot more sense to look the way it ended up.
god of war is no different. remember stage demonstrations are typically made without the full context of the entire game set in stone. entire areas may move around in the context of the whole narrative. what once was shown as a daytime mission, may now take place at night because the story and design have been finalized and require it.
this ain't no witcher 3 situation here people. not even remotely.