YES, i needed this. I had a larger base due to water, stone, copper and iron being kinda neatly placed within walking distance of eachother near the swamp, and that base registered as three different bases. Now they are all one and it just works

So, will this reduce in-game lag for a Mod city (like Han) that has lots of NPCs populating it? Or will this only help if you the player have a city you've made yourself?

That is correct, the new use ranges are quite generous, as to help avoid Pathfinding issues and slowdowns.
For a solo play through this will seem weird, but I've found this kind of change needed for complex bases with many workers.

It also means you can space things out a bit more, and allow you to make a nice looking base without worrying about the AI being inefficient by spending almost all of their time walking to transport items, which they will often do by only carrying 1-4 at a time.

this is not for everyone. say for example you set your npcs to mine some rock and use machines. a few minutes later your outpost gets invaded by some bandit, they all run over to kil it, next thing you know they are swinging pickaxes 500 yards from the rocknode, or inside a building, immersion breaking, i find its useless unless youre trying to build a large city like the modmaker.

very good!

Very nice, this will be useful!

Thank you for making this.