Thanks for all the compliments guys! I'm planning to have the map quite varied in all the kinds of underground sections it will showcase. For example, that is a salt mine area. There won't be so much space to fall in other parts of the map because I don't want the Pyro to have all the power.
You can also see I tried to make up for the Pyro's power by putting the point in a corner far from most of the cover. The point is in such a location both because of that, so that it's dangerous to be there as red because blue can rush in, and so that while blue is on the point, they can see a red assault coming. I mean for the first point to be easy, as this is Attack/defense, and the points will get progressively harder.
But all in all, I do want to have some classes more efficient than others at certain points; so there will be some strategy as such, don't worry.