Do they? I'm not so sure - if we're putting the large mount at the rear of the ship, how much of its range is going to be eaten up just by having to traverse the vessel's length before getting anywhere?
Admittedly, you could do a bit of kiting with a longer-range large energy by rotating the ship to bring the large turret to bear on the target - but at that point you're giving up the firepower of your entire forward weapon array, so I don't really see this as a big problem. If it is, though, maybe shift the mount to a more central location and only allow it to fire in a comparatively narrow forward arc; poof, problem solved.
I'd be in favor of giving the Aurora such a weapon mount if it's losing the HEF ship system.
When playtesting with my own variant, I did notice that a good chunk of range gets mitigated by the length of the ship. I don't know how that translates in actual range loss (maybe 30?). Losing the HEF system, paradoxically, also removes some of the "punch" I was hoping for in a re-balance. With it, you could argue that the medium mounts were more efficient during those bursts but without HEF, I agree: a large mount would not seem too excessive.
Honestly, the asymmetry of the ship doesn't bother me too much save for the fact the current rear medium mount has limited opportunity to be useful. If a large mount was more centrally located and had a narrow arc, that's fine but the sprite model doesn't accommodate that very easily.
Edit: Blackrock has a ton of maneuverability systems and those were themselves inspired by the maneuvering jets of Eagles/Falcons, etc. I don't see it as a big deal.
I hadn't thought of the new proposed changes as pigeon-holing the Aurora into SO builds, etc. Using more conventional arms, you'll be able to retreat better to vent and then come back again. It will be more active than say a hull that can just shield tank. I'm still of the opinion that a large mount with Alex's proposed plans would be great but I'll withhold judgement until I can play with it. That being said, I could try modding Alex's proposed changes into some of my variants and see how it feels. Alternatively, a Tri-Tach variant akin to the XIV Hegemony ships that throws in a large mount would be a nice compromise. :wink wink: