Yeah possibly, it would make sense from a Quality production viewpoint to not release an unfinished product. In terms of marketing/artist image, this is bad, since "inevitable" delays will just make some supporters leave(NOT ALL). Disappear has already stated that going forward they will hire the VAs ahead of time.
I still think they should release it soundless for now just to keep as many supporters as possible, especially right now since his Pixiv just went down and he won't know for certain if Pixiv will allow him to come back. I don't think releasing a soundless version will cause him to lose any supporters, I may be wrong, but for now, I can't see a reason why releasing a soundless version with the promise of the sound version coming out would make any supporters leave.
In my opinion, I think Omi needs to put some focus on his community. YES, his art is fantastic and truly Unique. Now imagine having a good and NON-toxic community that is supporting him financially and mentally??!! Who knows what kind of production he could be capable of? Also, Omi is one of the first creators that I have seen with a designated writer, which to me proves that he can work with others to create something of a similar vision. Imagine if he had the funding to hire other animators with him? Content would be PUMPING OUT MONTHLY (similar to Jackerman, but longer videos). Anyway, that's the end of my Rambling.