I noticed one thing right off. For your transporters, I noticed you had 5, 4 and 4 for your transporters, and I don't know how many, if any, points you spent on that.
If you paid a point for additional transporters, you receive your standard allotment for it. Meaning, instead of 5, 4, 4, you would actually have 8, 8, 8.
My only other nit on this is the classification of the ship, compared to its mission. Personally, I'd classify the Excalibur, as you've presented it, as more of an explorer than a heavy cruiser...especially if it's a post-DW design.
Davy Jones
"Frightened? My dear, you are looking at a man who has laughed in the face of death, sneered at doom, and chuckled at catastrophe! I was petrified."
-- The Wizard of Oz