Hello, I'm The Embraced One or TEO, and I'm the Fandom Wiki Manager for the Slime Rancher Wikia as well as an admin on Sekiro and the Hollow Knight Wikis in my free time. I'm here to act as a liaison between you and Fandom Staff and help you and your community. If you ever have any questions or issues related to the Wiki, its features (editing, templates, layouts, etc.), or anything else, feel free to reach out to me on my message wall and I will be happy to help out!
The Slime Rancher Fanon Wiki would be a cool place for you, because you can just vomit an idea into a page and post it! It's anything you want that's Slime Rancher Related. I'm also #2 on that wiki, two.
Asking repeatedly in multiple locations, while making the comment of a known concern won't neccasarily change an answer. In this case you are asking if soon he will put in twice as much effort to make something work when it will only break again in a couple of weeks. Modding takes time and work, pestering someone when they do this as a hobby and not a job begins to come across as ignorant and selfish to a degree.
It may have been a month since your save worked, but there are many factors none of us could possibly be aware of on top of the normal amount of work needed. Let alone the possibility he is waiting until 1.4.0 so his work wont be undone in a matter of weeks, or the fact they might very well be trying to convert it to a more cross store compatible version, which in of itself takes a bunch of work and UMF is in the process of updating, which can also break the mod if they go that route.
Long story short, asking again and again doesnt change anything other than the annoyance someone may have with that person, and the mod will be updated when emerald gets around to it.