Just a couple of notes on this topic... It seems that the devs have made a change, and now the vanilla planner does keep data relevant for inserters and such. See linked threads above for starting point if you want more info.
That being said, there still seems to be some things that the mod does that vanilla does not. The case I had that required this mod and still (as of now anyway) is not available in vanilla planner is replacing rails - they simply can't be selected in the vanilla planner (I'm assuming because they can't be fast-replaced), but this mod can. So thanks for having the option of this mod still, for the edge cases not handled in vanilla. :-)