Yes, there would be batteries bearing, but the batteries bearing on another moving object would remain stable as the batteries occluded, would be replaced by batteries coming into the clear. Another bonus would be less of a need to maneuver to bring batteries to bear. Yes, the powerplant's EP's would need to be calculated for the weapons. This is just from an engineering standpoint, personally I like the aesthetic of Traveller ships as they are.
Okay, I guess I can see that, and I guess if you have to point the ship in the direction it accelerates in, the potential advantage of having more firepower focused on one target would be outweighed by the extra difficulty in maneuvering. What about a cube, though? You'd get more surface area without (I think) much loss of anything else.
Over-Clocking of the Powerplant specifically, it isn't something that would be done, especially if it would lead to powerplant failure, which could be considered to be a catastrophic event. How it would be done if the Jump drive needs more power (and how IMTU how I always have figured it to be done) is to give the Jump drive it's own powerplant; thus if the J drive fails it would not disable the whole ship.
Ah. Well, I guess that makes sense. If you haven't yet, you might want to point this out in the thread for the ACS design...

I wonder what it would look like if the ship design and combat were focused on realism. Even if it doesn't stay that way, that might actually be a good starting place, and then add desired less realistic elements in.