Well this is very interesting! Thanks for posting.
I hope that person is a coder, or at least has sway with coders - there are many improvements that can be made to the modding system to greatly encourage and enable more and better modding.
We're missing dozens of defines that could allow us to manipulate features of the game. And we desperately need an overhaul of the defines.lua system such that each mod can specify only its incremental change, rather than including the whole file and making every mod that changes a feature incompatible with every other mod that changes any other feature. I've raised the last point to Captain Gars already and he said he would consider it post-1.4, so I plan to raise it again. That change alone would improve modding compatibility, and thus usefulness, substantially, because people could pick and choose a variety of feature-altering mods rather than being stuck with one unless they want to manually merge them themselves.
There's many, many more improvements like that they could make. Paradox modding is kind of good, but also in many ways disappointingly limited. It could be so much better, without all that much additional work from the devs. And as I've said many times already, dev time on improving modding features is a gift that keeps on giving - every man-day they spend on empowering modders with new features and access translates into 100 or 1000 man-days of community effort using those changes for the benefit of the game.
I really hope this person will help facilitate improving that! If they do, this could be a wonderful change.