Clash really was a pointless update. The main game did a great job of recreating that "Predator" experience in a multiplayer form, but Clash is just straight-up one of those "only included to pad out the back of the box"-type modes. The kind of thing everyone just played once, said "meh", then went back to Hunt.
A mode where you could team up with one or two people on the Predator side though, that would have been great. I'm not entirely sure how they could have gone about it, and given how much people bitched (and probably still do) about the balancing in the regular game I'm not sure how they would have been able to handle that aspect of it. But on paper that was certainly the mode I think people wanted the most.