Just a couple of observations - whilst on some ships such as the Vindicator and Vulture the relatively high DP cost works as a "unique capabilities tax" of sorts, the Zenith and Victory seem like they really struggle to justify their costs. The Zenith is about as tanky but significantly less shooty than a Dominator, with less OP. Speed's okay, but I still tilt my head at 30 DP. As for the Victory, at that sort of DP level a Paragon can casually gun an Onslaught down in a way a Victory simply cannot. With similar overall firepower, a reasonably good shield alone just doesn't feel worth a full extra 15 points.
The Archer, on the other hand, might be a touch underpriced, say by 1 or 2 DP. Even though it's a little slow, that's a lot of medium mounts for a 10 DP destroyer, and missile ships are (rightly) notorious for being overpowered in general.
I also kinda question what the point of adding the Reliant to the game was. Buuut that's enough of my complaining.