To shrink it down to the size it would fit through vanilla gates would in my opinion sort of ruin the idea of the mothership in the first place. The mothership in HW1-2 was a giant monolithic mobile factory and space station. And with its hyperspace technology makes more sense for it to only jump into sectors instead of using gate travel like in EVE.unless you force people who want to use this to either use the bigger gates, or gateless jumpdrive mod. you'll need to shrink the mothership, as it would collide with the gate when it exits (after using jumpdrive).
Also I am overjoyed to hear the hangers are being reopened for the Pride. Now I can persue my dream of using it as a giant carrier flagship in battle an an alternative to the fleet tender for my empire.
One question I do have is, will TS dock with it? I ask because I'm a sucker for mobile mining.