Yeah! And they were so against-RME in the beginning that it took them several months just to release upgrades for old RME (they didn't want to at start, if you recall) so it seems a bit strange they specifically mentioned a new category of RME-like weapons (aside from the already mentioned Ergon ones for RUN and GEO).
Now maybe I simply forgot that, but I really do not remember anything about it.
This doesn't absolutely mean that they won't ever release them, who knows, but given how Ergon weapons aren't really a "new category" but just mythic-like, I find it unlikely. I mean, what sort of Ergon weapons would they release for the other jobs? They don't need "mythic-like" weapons, since they already have Mythic.