This map is too unbalanced. Bravo has big advantages because they can simply camp somewhere or stay at the top and shoot down on incoming enemies.
In most cases alpha wins this map, but both sides have their chances for sure. Again, it's heavily tested like all these INF additions, they are balanced.
If you can't steal the flag and escape with it your own, you got another pretty simple tactic: just try get the bravo flag dropped down and wish that some your teammate is ready to pick it and escape.