You are correct about that but you didn't read exactly what i wrote... it is a fact that their body and soul are trapped and that they are forced to fight, but Sai's brother coudn't handle that, he couldn't fight against the ones he loves and he disappeared... If that doesn't happen then it will be TOTALLY FAKE. The way masashi did it he has almost ****ed the story. Listen :
1) Sai's brother "saw the drawings of Sai" and his soul was free... so he didn't fight, that should happen to ALL (EVERYONE HAS A BELOVED ONE, WHO IS DEAD)...
2) But if Masashi does that then we will see no fight. So he can't do it again which is FAKE!!! That happen to Sai and his brother.. Shouldn't that happen to Asuma and his apprentice? To Gaara and his father? To Tsunade and her brother? To the raikage and his father? To Action-man and his Grand sister...

3) Also Masashi realised that these Kin-Gin Bros, Where so stupid characters with more stupid weapond and EVEN MORE STUPID STORY, that he killed them immediately in two mangas...
I Think that he and his team have lost their inspiration and moreover their plans. They make up things that don't fit... I mean, noone can approach the nine tails, NOT EVEN MINATO and the two brothers like nothing has happened, were living inside it, eating, scratching their balls, playing PS3 and everything ok... Also the SO6P the greatest ninja of all the ultimate killer with the UBER ABILITIES was using a SUPER BARBIE WEAPON that would seal everyone who would say his most-used-word? Come on.... He would do a HYPER-TRIPLE-SUPER-Duper Edo Tensei, combined with a Kamehame wave and a Falcon Punch

... I don't know maybe i'm overreacting but that's how i see it...
I hope they will get serious again in the close future...