Ymmv I guess. I have seen you post fits like that, and they look very good, but I dont think they look any better then the well down combos I have seen with solid ties of the proper color and hue. Personal preference.
Yes, but it should be the other way around imo. First you expand your wardrobe with stuff you can wear with great versatility, then you add pieces that are cool that you can only wear in a few iterations.
But I dont really love that fit. Not because of the theory, I just dont like the combo much, and the lapels are no bueno for me.