Olag may not have been on PTS but I have, and by God, the exaggeration in these threads is insane to me.
Is it where it should be in terms of balancing RNG and direct upgrades? Not yet, but it's getting there. Takana is at least giving me pieces I can use on my Arsenal Merc, at an Item Rating around what I currently have on from world loot and Onderon dailies. For prices in the hundreds of frags, this is reasonable, but needs a little more improvement as I can absolutely see it falling over once I hit IR300, as others have been experiencing.
Spitballing:
Takana's prices are good for what the vendor is meant to do. Kai sells random specific items each weekend, but should probably have at least a few guaranteed items available (at least two of a gold moddable set bonus shell per class, and at least two or three tacs, imo). Takana's random piece tokens should always generate a set bonus piece for your spec at your next item level tier once you hit around 294.
That last point especially should significantly thin out the table the tokens you buy can pull from at higher item ratings, which would go a long way to correcting the RNG issue for harder content.