Diaby is a gonna be a monster if he can ever stay fit, so i understand why Wenger let him stick around, it was the same with RVP. Luckily Diaby is not a cunt, so he would hopefully stay, frimpong has no future here, should be sent out on loan in january and give him 6 months to prove himself in another premier league club.
You never know with Frimpong, if he gets enough games (and learns from it) he could become a beast perfect for crippling Scums and northern wankers.