At the risk of sounding like a hater, I'm very concerned about the idea of a full redo of what's already there? Development is already glacial, which isn't a sin or anything, but it's not preferable. I'd infinitely rather have new stuff than just slightly shinier old stuff. The old stuff is still good even if it isn't exactly the same.
Also as an avid fanfic reader, the whole thing feels like the death knell for any project. I think I've seen a 100% burnout rate on people that do this.
Now I'm definitely going to sound like a hater, but "Grove was bogging us down and holding us back from adding more content, features and mechanics." seems more like an upside than a downside to me lol. Many of the features and mechanics in their other project Prowler I'm very much not a fan of. I don't really feel like the game needs more mechanics. It just needs more content.