I'm glad to see this isn't definitely dead then... though will reserve judgement till this next update is actually out... but what's this about a switch from renpy? that'd not be ideal.
Dev thinks using RPGM will be easier then Renpy so they switched, or atleast thats what they said, really seems like they just saw a certain dev is successful and uses it and somehow came to the conclusion that the dev is successful because of RPGM rather than the fact that the dev has several games of good quality.
It definitely takes care of walking around but I think once they go to add anything else they'll end up just as frustrated if not more so, everything I've seen is that if you aren't making a jrpg its a pain to use and is missing several common/well liked features of adult games like proper save management and being able to go back a step in dialogues.
Honestly the second I see a game is in RPGM I just go find a save and hope there is a gallery mode, the games all end up being a tedious slog to get to anything good. I'm not here to play final fantasy, I'm here for the story and the nudes, walking around looking for the one square hidden away somewhere that you need to press to advance isn't engaging and takes time away from the Dev working on the actual good parts. The reason VNs are so popular around here is they cut out all the busywork that doesn't add anything. RPGM is those shows where every other episode is filler and the intro/recap is half the duration of the show, the few bits that advance the plot are good but I'll quit out of frustration before I ever finish it.