Being Kara ready is not difficult, it just dedication to the game and a basic knowledge of your class/ build for your enchants and gems.
Frankly, the guys gear is garbage for a level 70 doing raids. His talent choice is great for soloing or doing 5 man non-heroics for versatility. But for raids or heroics, you need to be more specialized in your build to really perfrom well enough to be worth a raid slot. His damage is going to be horrible compared to a full on 41/20 BM/MM DPS build. Even for his build and crappy gear 230 DPS is ridiculously low, When I was Kara ready (even with 2 greens still on me) I was doing between 600-750 DPS, now I can do 750-1000 or more DPS depending on my CD's and the boss we're fighting (phases where damage is increased).
Aethiens Pre-Raid gear list is by far the easiest way to know you're going to be Kara ready, it's a gimme. follow it and know how to play and your set, otherwise just give up now and don't plan on raiding.
I hate to say it, because i'm coming to the point in my real life where I might have to quit playing WoW, or at least doing end-game stuff, but if you can't or won't put the time into playing your class as well as you can in a raid slot, give it to someone who will be able to, this game may be about fun, but once you start raiding it's not just fun anymore, it's a commitment just like any other, either own up to the time and responsibility or just don't do it.