Of course. Just disable all WWs in configuration file. You will find instruction inside and in the op.
Unfortunately you currently cannot play the opposite config.
I disabled all the added wonders as you said in the OP, but I would also like the original wonders to just be like how they are normally. I'm not a fan of the terrain requirements and would just like some more natural wonder variety. Is that possible and could you please point me in the right direction?
I'm not sure what you meant with the "cannot play the opposite config"? If you meant that this is not possible or that you can't play with just the world wonders and not the new natural wonders. Thanks in advance!

I have also found some more typos/errors in the Promotion Overhaul, will summarise them later.