..so my only question is why didnt he do that release himself from the jutsu before? can it only be performed when the jutsu is stopped or at anytime?
Only after Itachi released the ET were the resurrected bodies allowed to go free. Basically they are aware they are dead but they choose to RIP. Madara on the other hand had different motives and as someone mentioned earlier, he is back to normal coz his skin changed.
We have a few things to take into consideration:
1) Suigetsu and that scroll, maybe thats the key to beating Madara
2) Sasuke's motives, what will he do now that he knows the truth about why Itachi slaughtered his clan
3) Zetsu and Yamato ( I'm more interested in whats happening here)
4) Tobi + Naruto technically Tobi needed those Jinchuriki to go up against Naruto, so whats his plan now?
Off topic. I know this is probably impossible but wouldn't it be weird if Obito was tobi? I say this because after reading the manga we find in Kakashi's past that Obito gave Kakashi his right eye because it didn't get hit by the rock. Tobi's eye-hole on his mask is on his left while kakashi wears his mask over his right, coincidence? And he also implanted Rinnegan into his right eye.