While I appreciate the sentiment, I haven't really done anything aside from collecting all of the planet mods I could find into one pack, with only one minor cosmetic compatibility patch between them (and of course, the descriptions for each on the information page).
The planet mod authors themselves deserve most of the credit for making sure they don't conflict with each other. I suppose they might use this modpack as part of their compatibility testing, but I do believe this is something that anyone could have made, I just happened to be the first, and most dedicated.
Janus was definitely an interesting planet with its unique looping spoilage mechanic, a shame that it had to be made optional, but it appears to have been abandoned by its original mod author, as some part of its old code conflicts with something that Cerys needs to function in the latest update.
For the most part, the bar for entry is pretty low for this particular modpack; it just needs to add a new planet or space location, add some meaningful reward (a reason to visit and complete), and not conflict with the other planets.