Yep...my EBC rotors are wearing really fast too with grooves and all... I won't buy them again. I heard riders rave about their HH pads. So, I bought a pair and was not impressed either. I made a bad call on my brake set-up. I am reverting back to stock. Honda rotors are very good.
The rear link depends on your weight. I've been told heavier riders ( 220 lbs+) are okay with the stock link but the spring is too light. I was 220 now 210 and I am okay with it. I do however have the preload at ramp #7 with sag at 25mm, ( like stiffer shocks for feel) So, obviously the spring is too weak.
Since I have spent so much stupid money on my bikes, I would do it right-
I would drop the $1299 on the Ohlins shock/ DK link kit and have them spec it out just for you. Then, if I sold the RC, I would pull it off and sell it separately.