TL;DR
Let player pick a set of modules they prefer, including mods, in a convenient way.What ?
Modules = parts of the game. Map generator, interface, recipes version etc. It could all be set in a convenient way. Mods could be put into groups and saved to easily return the right combos. Same as in OpenTTD. And big-time options like mentioned before.Why ?
Trying v17.xx I find it very contrast. I love the map generator but the new quick-bar is awful. I'm already used to the old one. It was perfect. There is a rule: "don't fix what's not broken". I first played Factorio v12 (I guess), it had a good map generator. When I upgraded I had to use RSO mod. But it doesn't help much, maps are still too random, too hard to control. One step of water frequency is a difference between waterless desert and land shredded with ugliest lakes.So each version had it's glory and it's shame. And people always like different things. You can't please everyone if you pick a road and follow it. You need a crossroads. Modular game would let everyone pick what they like. So it pleases ALL players. It obviously benefits the game quality and future sells. It makes life easier for mod users and thus for mod makers as well. It keeps development in order, like a good factory. You can always work separately on a module of trouble, make a new one without touching all the game or let mod makers help by providing their versions of base modules. It also allows for statistics generation, to see what players prefer, how much they like new modules, instead of having a general rating that says nothing.
The more options we have - the better. If we can tune the game in options "change at your own risk", like what Firefox has, we could remove what we really hate and pick a new value that seems more balanced to us. This is the key for making a game that everyone loves. No one can complain if everything is in their hands. Because we all like something different.
As for me, I'm stuck between versions. v17 is not ready yet, v16 still has awful maps, previous versions probably lack content but were most fun. And I can do nothing about it. Only wait for the right mods to come. I hope I made it clear how we ALL benefit from such a game management. The game must live on. And it will if it stays flexible, not turns to stone.