I think the windows are way too large - you can get pretty much the same effect using long clusters of smaller windows, which also help to sell the scale better. Otherwise, great job so far - I'm very curious to see how you end up tackling the blister guns. Is there a reason you went with a rounded engine block? Most versions of this ship I've seen have a big rectangular-section engine assembly.
14000 crew is no problem, space wise - after all, this thing has the volume of 8+ modern supercarriers, and that's 40000+ crew all told. It's just stupidly inefficient, since an Acclamator can run on ~1000 (but then again, the way these things are written up - they ARE stupidly inefficient).