In twitter CapnLogan said the skin for the X will be in the Venture Pack - it unlocks for the X when you buy that Ship pack. So you get the T4 Galaxy, T5 Refit Skin, and Galaxy X skin as part of the pack.
And this skin is actually something I will gladly pay for
Sure, its got the Phaser Cannon, the bridge cannons, and the under pylon fins, but the 3rd Nacelle is what gives the Galaxy-X its own, unique character.
The point is that Cryptic wants people being able to identify different kind of ships to have a vague anticipation of what they the other ship can do just by looking(Was said a long time ago though).
While it actually pretty easy to miss the lance and the two cannons, the third narcelle clearly visible from almost every angle and, therefore, hard to miss.
I'm with you on this one. That ship will not look better until that afterthought of a nacelle can be removed.
Then it wouldn't be a Dreadnought, it'd be just another Galaxy Class Starship with another skin. There was a bug that allowed you to remove the third Nacelle, but it removed the Third Nacelle, the twin Impulse Engines, and the Lance Cannon, leaving it to be the actual Galaxy 'Venture' Refit.
If you don't like the fact it has the third Nacelle. Don't fly it and just get the Retrofit at VA. S'just that simple.