Gobi: The most potential map here. The entrances in bases got a bit too tight. Seems pretty easy to defend with spas/spray from spawns to entrances. Also in case where both teams have flag, the game gets boring as the flag holding is easy. However the map is worth testing. In addition, fix the left alpha spawn, there's player colliding polygon on that fence scenery and player can't drop down.
Tengo: The first thought when saw this sketch, was just picking m79 and nadeboost myself to enemy flag and escape the bottom route. Nothing has changed after that, except that while I'm boosting, at some point I collide with invisible roof. 1-2 defenders and the rest boosting attackers, I prefer Equinox.
Blueballs: Agreed with As de Espada, the map matches better for other gamemode than ctf. Would be interesting tdm/dm/htf map.