I found a Resonator from a hidden cache. The Resonators would have been C-tier weapons at best if they were standard-issue Persean Sector equipment. As something we're supposed to see as ultra high tech rewards from an incomprehensible foe it's F-tier. In fact, Sabots would have made for a more convincing Omega weapon, had they not already been standard-issue missiles.
Resonators lack the EMP component that makes Sabots rough to take whether shields are on or off, they're much easier to knock out with flak than Sabots (or torpedos like Hammers, for that matter), their ammunition system is designed in such a way that they get the least amount of benefit from both FMR and Missile Autoforge (Sabot Pods can get some mileage out of either), they're exceptionally premium priced, and they produce flux at an unimpressive 1:1 efficiency on top of possessing interceptible projectiles. Their sole advantage is technically-higher range (which almost never matters) and infinite ammunition, which is not nearly as an impressive trait as it used to be given that one can casually stack +200% ammunition through officers and SP before spending a single OP.
(many of those points are true for the other Omega missiles, but those compensate by otherwise being amazing with no real near-peer alternatives)
The Resonator wasn't good, either in theory or in practice. I swapped that out for a real missile quite quickly.
I also received 2 Shock Repeaters from that same pod. While they weren't great and have room for improvements, I found them fairly useful.
Shock Repeaters are energy small PD, in a world where all the energy small PD options are not actually very good. Against missiles, they disable the engines (I kinda thought they were intended to disable the warheads entirely, but that doesn't seem to be the case), so they can be used to negate Salamanders or disable guided missile engines such as Harpoons and then move out of the way; functionally a mission kill. They're significantly more useful alleviating fighter attacks, where one hit is sufficient to knock out their engines and leave them aimlessly drifting in the void; the other small energy weapons can't really do that well. I used 2 of those on a mod Vale super destroyer, because those 2 small turrets were the only options, and that was the best method I had to make the most of an extremely limited PD grid. They'd probably be decent enough on a vanilla Medusa's 2 front small energy turrets for similar reasons.
Shock Repeaters aren't fantastic, they could be better, but they have a decent niche, and they definitely don't deserve to be singled out as the ugly duckling when Resonator MRMs exist.
Also, Cryoblasters are S-tier. No explanation needed.