I'll add for my two cents, Lagrange Points/LPs are really only practical for traveling between distant stars in a binary+ system. For traveling between planets they're rarely of any use due to being offset 60 degrees, so on average you're traveling the same distance regardless of LPs and in any case they don't work well with cycled orders when you're trying to automate, e.g., colony growth shipments.
In this case as long as you can create a LP around whichever star doesn't already have one, it will be useful.