I'd think once MS is released, only a few "Patches" would be added. Not really any new, interesting things. As NW is a great game, I see it at it's highest potential. It is basically a one of a kind game. Releasing the module system, will invite a BUNCH of mods into the NW community. But all the modders are waiting for the MS. I'd say giving a Date to when it will be released, is quite dumb. Because all you will see, if "GIVE ME THE MS ALREADY" "I WANT IT", basically mass spam about the Module System. So yeah, I agree with no specific date. Whenever FSE and Taleworlds are willing to release it, it will be in fact a glorious day. But until then, everyone shall wait.
Good luck Vincenzo & team on future patches and stuff