The addition of xennon Qs pose a big threat to factory cargo ships and universal traders, essentially making running factories along xennon partol routes especially hazardous.

I've lost count how many universal traders and factory cargo ships I lost along getsu fune-->family zyarch and blackhole sun--> grand change route.

Is there a way to remotely deal with xenon Qs in an economical manner?

TC's out of sector combat system/simulation is quite broken and doesn't realistically model what would happen with in-sector combat. They fixed it in AP (or at least vastly improved it), which is why I usually recommend just playing AP and modding the TC plot to it, if you're interested in that.

In short, I'm not sure what to recommend in TC. An out-of-sector Q is just so overpowered little can stand up against it, save for an M2.