Not much feedback to deliver, the entire ship is perfect. I can only find two issues which should be addressed and both of them are located at the back of the ship.
The engines;
Since the model is not getting a radiator-like module, the engines can become slightly more sophisticated again. I think the engine's cylinder should be removed and whatever remains should be turned into something like this, covering the entire rectangular.
The high-tech module;
I am referring to the mirror-like module in the middle. Its tail should be removed as it gives the ship a very heavy look, and instead engrave on the glass of this module the LH thunder (not the crosshair). Of course engraving means that the logo will have just a slightly different color than the glass, either heavier or lighter color (whatever you feel it suits better after the ship is textured).
If I am allowed to say, if this can be incorporated into the model, it will become one of its kind in Discovery.