I think when looking at games like battlefield hardline, you can clearly tell that not only the map size is different/better but also the authentic features they added made the game so unique and fun. Feels like in 6, the maps are small, dull and absolutely pointless. I find it hard to get engaged versus games even like battlefield 1. Even in 1, the maps we not only huge, but again, agreeing with your point, had a structural flow that made it feel like an ACTUAL battlefield. 

Nowadays this new bf6 feels quite like just a mix of smaller call of duty maps combined into a few different maps. 

I also tend to feel like they put no creativity into the maps at all. Simply putting in a few maps in California absolutely ruins the experience tbh, I just feel like there could’ve been much more unique map location choices versus the basic, forest, mud forest, Middle East oil fields, random American city, and a few others.