Replayed Thessia earlier.
This is only for when you have picked up Javik before, in addition to already having examined one of the frescos left or right to the big Athame statue and made the connection to Athame looking like a Prothean.
The 2nd squad mate reacts to the order in which you investigate sword and shield of Athame. If you investigate the shield first, they will refer to the shield when you investigate the sword, and vice-versa. Didn't notice that before.
Also, if you go straight to the statue and don't investigate the artifacts at all despite having picked up Javik, the dialogue stays the same as if you never picked up Javik (the "dead religion" dialogue). Well, that makes sense since you don't make the connection to Athame being a Prothean before, just thought I'd mention it anyway 
And finally, once the beacon is out in the open and you take your sweet time, both Liara and then some time later the other squad mate tell you the beacon is ready.