Banter??

Really? I had Vetra and Cora for Eos and those two were a pair of chatterboxes while I was driving around in the Nomad.

Now that you mention it, Liam and Vetra have not interacted at all. Cora and Liam also did not chat. Maybe Cora & Vetra have issues with Liam.

Funny how there was too much banter in the gameplay peebee mission before release and now playing on other planets i don't get any chat at all, also on habitat 7 you scan plants and trees etc, now i was on another planet with new wildlife and ecosystem and cannot scan a single plant wtf?

Heard two banter conversations between Cora and Liam out of maybe 30 min of running/driving around on Eos (not counting times I was in combat). Both were triggered while in the Nomad. I think that, as was the case in DAI, there has to be basically nothing else going on in order for the banter to trigger (can't be in combat, can't be in an area where mission/location-specific banter occurs, etc.). I suggest just driving around in circles with the Nomad and see if you can get it to trigger.