Hypershunt guardian fights seem incredibly skewed against not using high-tech.
1. Omega ships are vulnerable to flanking, which won't happen if you don't use high-tech, since only those ships can keep up with omega ships. Hardpoints of Onslaught and Dominator are also somewhat hard to use against omega.
2. Omega weapons are way, way stronger against low-tech. Or maybe their loadouts are. It doesn't really matter, the end result is that high-tech only fleet can tank kinetic-heavy loadouts and fight back, whereas low-tech has to dump sabots everywhere and hope to kill ships with cryoblasters immediately, because they will flux war to them immediately, and since ships with cryoblasters also have disintegrators, low-tech has to deal with those ships immediately, or face the prospect that a Tessaract or a Facet will come once, win the flux war and spray disintegrators all over you, withdraw, then come for another go, but this time it kills you in 5 seconds because of cryoblasters' insane DPS against hull (and armour you don't have anymore, thanks to disintegrators).
3. Weapons low-tech has at its disposal are sub-par to dealing with omega. Low-tech wants to stay together, because omegas will burst them down otherwise, yet they also want to pursue omega to make sure they stay overfluxed, but that's overextending, not to mention that the further from the group you get, the longer the harpoons take to get to your enemy - if they have the range for that at all! Not to mention that omega PD is best against finishers, essentially, which low-tech relies on to score kills.
4. Since you need to destroy omega ships as soon as possible as low-tech, this means you have to designate some sabot-dumper ships and hope they'll have some sabots left over for later, since you cannot order a ship to dump only some of its missiles.
1 and 3 are going to be kinda addressed in the next patch (since burn drive will become cancellable and Eradicator will essentially merge best traits of Enforcer and Dominator), though it's 2 that's most annoying to me. High-tech fleet makes a mistake against omegas, it loses a ship. Low-tech makes a mistake against omegas, it loses the entire battle.