Guys do you actually need to get in touch with Yandere to take where they left off? I was under the impression that said 85% was already included in the current partial patch, as a good chunk of the Miyako story route is already translated in said patch. It may sound silly but, it would probably save time if you start translating from that point. I dont know anything about software, but if you can't release a patch that starts from a certain line, I would think you could somehow rip what lies translated in said patch for the Miyako route. Also this is just my opinion but I think Yandere is basically dead, no one there would want to make a formal statement like "Sorry we picked up these projects and didn't finish them, but enjoy what we did do. Oyasumi!" They did good work but if you put yourself in their shoes it makes sense what is going on.
Also are you guys planning on working on parts of Majikoi S? One thing I've noticed is that Majikoi S has alot less content than Majikoi so it would certainly be a faster translation, but also has more routes so it would be a more optimal oppurunity to release partial patches and ease responsibility on whoever is translating. I don't think this would be much offense to Wairu anyways as they are working on something else.
Thanks for your help translating this regardless.