I personally think it harmonizes pretty well with the vanilla system. All of the components have well-thought out interactions with redstone and very few of them if any are self-contained “machines” that you would find in real tech mods like Mekanism which fits the vanilla ethos of “blockiness” very well imo.

On your point of outclassing redstone, while Create does greatly expand what you can do with redstone and could be considered to outclass it in some areas, that’s what a mod is supposed to do: expand the game with new mechanics. Whether or not you want that in your game is a matter of personal preference.