Will they? I had not heard anything about this. Care to provide a source?
I just had a unique conversation with Morrigan in the Mage Tower that I've never heard before, despite several playthroughs of dragging her everywhere. It was a pleasant surprise. I loved the freedom of talking to companions any time and anywhere, but I can see how it wasn't actually necessary, so long as the PC can strike up conversations with them at home base instead of waiting for random cutscenes to trigger like in DA2 (lordy how I hated that). It would have been nice to still get area-specific dialogue like Leliana had in DA:O, though.
I can see the potential reasons for why they got rid of them, but none of them really struck me as compelling. Sure, there is always the home base, but how often do friends refuse to talk to you until you've gone somewhere more private? It does happen, but it really depends on the topic. Leliana needing time to think about what happened with Marjolaine was an example of when waiting to return to camp made sense.
Not particularly, no.
I had a bad habbit of accidentally clicking my party members, so there'd be really, really awkward moments when I and my LI were discussing our ~*relationship*~ right in front of the rest of the party, covered in bandit / darkspawn entrails.
The one that takes the cake is Alistar's hissy fit in the middle of the Deep Roads where he wanted to have the "are we a thing or do you fancy Zevran" convo. The kicker? I had talked to Zevran like three times, and two of them were gift-related. I hadn't even flirted with him, for Maker's sake!
Although your experience was problematic, it still sounds pretty unique. Alistair's jealousy comes to a boil in the depths of the Deep Roads? Fantastic!
But to be more serious, those were issues that could've been fixed instead of having that entire mechanic removed. Implement a system where you tap A for a quick one-liner and hold A to open a dialogue. Have an unseen label attached to more private topics that keep them unavailable in public conversations. My point is, it could have been done and now that the technology is more advanced, I'd like to see it come back.