CyberHank, theres a minute and a half of the battle that we know almost nothing about, cept that they lost one ship, and the Amar got hit. What if they did cloak during that time, only to find that their cloak didnt work against V'Ger, who deftly plucked one of them out while they were cloaked and digitized them. Engaging the cloak probably would not have helped the Amar. Retreating from the battle, despite that the opponent was the size of a Solar System, had prolly left a bad taste in his mouth. My question though, is why didn't they just go to warp?
On another note, the D7T does not have a cloak in SFCII, but too many times ive seen that ship up against a Light Cruiser in a Random battle. The D7T has almost the same firepower as a Federation Command Cruiser, yet its BPV places it in the Light Cruiser range. Adding a Cloak, for another 20% of its BPV might just push it into the Heavy Cruiser range, where it will still be able to compete, since after all, it is a Heavy Cruiser.