Still makes little sense, since it needs a ML-appropriate long LoF to be of any use. So if it had no access to it in the first place, it is likely to need a heap of Orders to get there. Any long movement with such a duo is, again, something I cannot see the point of. They're long-range gunfighters. Getting them upfield means you forfeit yout range advantage, and give it to your opponent. Neither of them is a Specialist to warrant moving thme closer to an Objective.
I would go with fireteam: duo seeing a future update. I don't see very many people saying anything good about it and I have never seen anyone use it either. So if CB wanted to address that they could add duos with their faction updates to take advantage of its future update. Personally I would take duos out of the fireteam progression and make them unique. Maybe they don't use team leaders and both activate on both parts of the order. So they both would move and both could shoot on one order.
Making multi-aro by moving at the same time looks ok, but CB, why should that Duo be those? If it was Fasid/Azrail + Rafiq /Fanous, it would be very reasonable to use.
I only realized today about this swap. Since i started playing QK this march, it was always Rafiq duo. (Rafid azrail in QK and rafiq al fasid in Ramah). But I was looking at the models that I got back from commission and I received azra'il and shaytaniyah as a theme painted pair (and then looked, and it was what I ordered.) So now i have mixed feeling... i love the rafiq duo and used it a lot in TTS (with various wildcard swaps) and I know I would not want the ML in a duo... but on the other side, i'm sad that my models are now mismatched.