I agree 100% that K-1's model was outdated and screwed up. Its a big reason why they failed as well. If the problem in recent years was the lack of a Japanese star (with Masato retiring), its in the lower weights that they would have had their next star. Even in boxing, Japanese have several champions in the lower weights.
I don't like how Glory just copied the MMA weight-classes, disregarding the traditional boxing & kickboxing weightclasses. You don't need to have super/junior weights like boxing, but going from 155 to 170 to 185 lbs doesn't seem suitable (big leap, & kill lotta prospects who fall in-between) and the names don't match other orgs'. Here's how i would have done it:
LW (135 lbs), WW (145), MW (155 lbs/ 70kg), Sr MW (165), Lt HW (180), CW (200), HW (+200).