I think its fine how it is. People who concentrate on purely accuracy arent going to be very effective. Ive had more success with lower accuracy builds with higher defense than builds with higher accuracy and poor defense.
youre gonna get hit no matter what, per the greater randomness of cr2 rolls. anyone who doesnt understand this by now is just dense. your only hope is to specialise in one or the other, the whole idea is to have VERY good accuracy OR defense. 'average' anything in cr2 is a lost fight waiting to happen, the randomness will get you, and yer little dog, too!#$
If you wait for your opponent to use all their IS by having decent resistance, you're able to use your specials and roll higher than their normal speed/power/grab attacks. You do not need a ton of defense or accuracy. You need to stay alive and let the randomness (and your STATS) do the rest of the work for you.
Different strats.
Added benefit of high defense is your opponent is less likely to draw a state on you and set up a big damage special or combo.