Now, ignoring any balancing concerns to be had about the Glaive, I want to comment on this point -
"Changing the Rules of Engagement" is what I previously referred to as either progressive or disruptive improvement, all within the possible technological state of the nations involved (therefore within the realm of possible >>> Rules of Real Life).
You are applying HUMAN reasoning and limits to an extremely advanced species that has existed for millions of years, and travelled space for at least a million years, probably longer. Do you expect them to play by human rule sets and concepts? I don’t think so…
There is also nothing to indicate that the Glaives and/or Guardian neutralizer field are anything new at all. It is possible, and in fact quite likely, that they simply were not deployed until the conflict escalated further.
Now should the Glaives have the Guardian neutralizer field in gameplay? That point can be argued for CZs(especially), since Medusas and Hydras basically make the human AX weapons completely obsolete, and at least the latter is guaranteed to show up at the end. (Dunno how the AX multi and missile fare against Basilisks but I don’t need to use them against the high-end interceptors to know they’d be nigh useless unless basically everyone shot at the same target with them.)
Perhaps they could tone it down, if it has to be kept. If it takes 1/2% of integrity away per second, that sounds as intense as the neutralizer field of the Maelstroms, and that sounds a bit off for a (relatively) small ship like the Glaive is, even if it’s limited in range.
And perhaps allow module reinforcements to counteract its effect to an extent. As I mentioned elsewhere, currently they do absolutely nothing against the anti-Guardian field.
Or Frontier will eventually use the unclassified relic’s existence to excuse new weapons being made, that are not affected due to being hybrid tech, because that’s what they do.