I don’t disagree with this, and I’ve never had the good fortune of being in Legends (I have no doubt it’d be awesome).
When it comes to colors and layouts, I think the overabundance of gray with the drab concrete is what ruins it for me. The blue is cool, but the concourses suffer from the exposed concrete, like we’re in a factory.
The other obvious part of this is the food, which has already been mentioned. The Mets look like they have deals with local vendors/restaurants in addition to regular ballpark fare (most likely from Aramark or Sodexo, the same companies that provide food to prisons, schools, and other stadiums), whereas the Yankees pretty much only have food from Aramark/Sodexo.
I have to ignore the food for this discussion because that's always changeable. In terms of the architecture, I kind of prefer the minimalist design at Yankee Stadium. Maybe I just have an exposed concrete style personality.