You realize you can just open up the ship .csv and edit anything you disagree with, right?
GH ships are a flat 10% better than the base model, balanced only slightly by the armor and staying power debuff from the hullmod.
They have more OP to play with from the weapons cost reduction, their ship systems are better versions of the base ships, and they're stylish as all heckin.
I realize you're probably new to the game and don't have much experience - but the ships are WAY up there on the cost/effectiveness of mod ships, they're VERY good, stats wise.
And the Ristreza is a player bait ship - it can completely solo fleets that aren't heavy on shielded fighter spam/absurdly low ratio shields. A Ristreza is around the price of a conquest, and MUCH more effective. It's akin to a yamato, morpheus, or deserter sparrowhawk.