Again, very good idea, and hard decision to make.
xenoarcheologists, should not be taken as indiana jones kinds of guys brushing sand off some vases. Since this is military unit i assume those are more like combat scientists. Currently there are combat engineers in army and despite the name those are guys keeping the power generator in base working, changing CAN bus in humvee, recovering broken vehicles or armament, setting wifi in barracs or securing antennas and radar instalations. Those are armed (combat thingy in the name) guys, and trained to some extent, but fighting is not their best use, and are not used in that way mostly at all.
in my opinion xenoarcheologists are the science guys that can determine what is worth taking, whenever that rock/rubble/pertruding-in-your-face-barrel-thats-definitively-loaded-with-bad-stuff/writing/vase is worth, and safe to take with you.
IMO its not necessary bad to add such quality to the xenoarcheologists (especially that those are mostly just standing there most of the time) or it can be done with other unit too, but the issue with that naming stuff, (post by Migi) you are against it just because bad naming (-archeologists stuff in xenoarcheoligists), so there is a good chance that this could be solved just by changing unit name to xenoanalytics.