Still, better to get plenty of issues out of the way now than in a few iterations time, I hope you don't feel disheartened by the feedback, I think the map has potential.
Also I'd like to say that I think the splitting up of the front and back end can still be done, just not so drastically, I thought those perches above left and right of the centre tunnel were nice, it's just the corridors to it were really tight and also you didn't get much of a vantage point from them to the bots starting point. People were getting mad at the Pyro not only because of the high % of projectiles they were reflecting but also because the natural advantages pyro have was exacerbated by the cramped front area.