you do realize that all of this has been discussed in this very thread over the last page or two right? Including the lack of contact info for kyois.
As to your poionts, yes fan revivals/continuations/remakes happen sometimes when a dev abandons things even if you cant get permission. The best you can do is stop if the original dev comes back and asks you to.
As far as we talked about it in discord what WE would prefer is to go over the existing content and note down all the lore and plot and try to build on it in a way that feels as similar to where kyois was going as possible.
Well then it might be easier to start this from scratch (and then continue it from the last update) as a remake if a remake of an abandoned game doesnt need the original game's dev's permission and since many of you dont think that Kyois will be back at all, or said that Kyois wont be back at all, theres no need to wait for Kyois.
I' didnt check the discord yet but if there are already ppl ready and willing to do everything that is needed (checking the lore, dealing with modelling, animations, coding etc.) for this game to be continued, even as a remake, im very glad and happy about it and i'm sure i'll check out how it will progress.
I saw quite good remakes of some of the games (although it was a long while ago) that later got abandoned, or were made when there was a "too long silence" between 2 updates of an original game, and liked the remakes too, so i bet i'd like the remake of this game too, if and when it will have a first release.