Trade hats?

I don't really understand why people go to such lengths to enhance armor to 5, 6, even higher stars anyway. The gains are too erratic and costly to be worthwhile. You're not even guaranteed to get the stat you want.... <_<; It's minimally worthwhile for Xenons, yeah, but still... isn't there a much more cost-effective way to upgrade than enhancing armor?

More closely on topic, however.. I would just wait and see how the new enhancing mechanics turn out on KMS.