Hi, it would be nice to have a separate creative tab for all the things added by this mod.

Why though? It's pretty simple to do that and makes it less messy, no? Also, that's none of my business, but shouldn't you keep the issue open then?

No plans for this at the moment

We intentionally put our content alongside vanilla stuff, to feel more like part of the game.
The issue is closed because its not a feature we want, therefore not an issue.