I understand the B criticism, hence why I want one more avenue to take it from mid, a one way avenue like it used to be, but mid isn't bad. The map itself is compact and it makes taking mid weird but also super rewarding. And Dust2 isn't a "proper competitive" map either and especially after the new update, it will become even more boring.
Vertigo is a fun and more straight forward map to play. Rotations don't take years, wallbangs exists, unique layout with possibilities for some nice one-ways, utility usage is key. Dust has long range duels and saving. No longer Ts abusing T spawn AWP camping? Now its CTs abusing lower pushes every round! Yay! The worst map ever. Even my 1.6 nostalgia won't save that map. It's so awful.