Having played a few rounds on it, I can confidently say that this is quite a great map! The overall layout of the first 4 objectives is nice and varied, but what really makes this map outstanding is the submarine pens: the size of that final area allows for numerous approaches for both attackers and defenders. I don't need to imagine how painstaking it must have been to model the entire submarine base, but your effort is well worth it for the gameplay it brings.
A few points of critique:
1) From my experience, the attackers can easily be stonewalled at Objectives A+B and I think that is due largely to the Axis spawning, at round start, right between them. You might want to consider moving the initial Axis spawn a bit away from A+B or add more minutes to round time.
2) To echo morticore and Drecks, the ground around the trenches comprising Objective C are rather awkward and players can easily get stuck along them on their outer sides. Have you intentionally left out mantle nodes so as to keep Axis off the beach and the slope between it and the trench? If not, I'd suggest implementing those as a way to remedy to players getting stuck and allow for more freedom of movement.