Yeah thats pretty much it tbh. Its just a little diappointing to use iron banner weapons (especially the new rocket sidearm) in pve knowing that the origin trait is essentially useless.
Not sure about the technical aspects but, maybe have enemies target less after a final blow with low health? Especially if you want to keep the functionality there with it being to do with radar/stealth.
Not entirely sure what the vision for this trait could be in PVE but I think its possible to add some bonus to it. And honestly, it could get some people playing more IB but thats just an extra I suppose.
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Kills with this weapon generate seeking explosive rounds at the targets location