I would hope that we just get a wider variety of buffs and mix/match of the colors and such.
I am not sure its OP: to be OP it would have to seriously help you in combat or something. Its a bit frustrating that its the ONLY real choice once you have it, but that isnt the same as OP, it just means there needs to be 2 or 3 others equally good to pick from, probably things we will get sooner or later.