This is looking great! I think my biggest comment would be that the bricks look a little too perfectly straight and even, a tinybit of randomized rotation and position on some bricks could go a long way. Also if a few of the bricks were sunken a little bit deeper in the mortar it could add some nice variation across the surface. The chipping is looking really good and I love the color variations.
Totally agree with what Pawige said, I think for me its more "annoying" that they do not have random height positions and instead all at the same level.
Thought i'd share a bit of an update. I changed my pattern generator from Brick Generator to Tile Generator so I can unlock rotation and offsets with a lot more control, made the changes more subtle. Also tweaked the mortar slightly to give a more uneven look and improved blending in the height. Need to tune the roughness now.
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https://www.artstation.com/artwork/vq9LA