I played this map today and I noticed very small things (not map braking) at all! But a couple places were there were junctions of pieces that didnt meet the same elevation only by one coordinate of height, and gave the players a slight bump in movement! A lower 4x4 platform could perhaps use a little bit more cover!
This could be just my preference and just a thought but, if budget allowed, I would knock out some of the coliseum walls and let the light in, and dig a little deeper to assist the dynamic lighting! Perhaps some Coliseum windows, or visual guides that tell a player this is not a playable area! The lighting wasnt broken, but not happening either!
Honestly I really enjoy the layout, of all the different elevations! I utilized all biomes of the map, in which none felt like dominating, nor vulnerable! Very balanced at that! I would not touch the layout, this is what makes this map unique! I love all the structural molding, and aesthetic overhead touches you did!
This map will be just fine in my hard drive and add to my custom rotation (I am gonna download the colored render though)! I myself am not new to Forge, but new to submission, and look forward to more of your builds!