Board Thread:Theories and Speculation/@comment-31099706-20170327120301/@comment-31099706-20170421020118

Itachi wasn't holding back against Kakashi nor Sasuke with Tsukuyomi. and if I'm right Itachi's character got changed during part 2 so that part 1 was him being evil and also proves that he did not hold back.

Well 71 years Tsukuyomi seemed too much for me. and even the anime did not show it even though they have alot of non canon stuff already. And anyways it just means that Itachi can increase the power as in duration of the tsukuyomi time(with more chakra intake and eye strain obiviously) but it does not mean that he can use a 'watered down version' of it.

I really don't see a reason on why Itachi was ready to use a Tsukuyomi on 7 year old and 12 year old Sasuke but not at a 16 year old one. We already saw many many genjutsus and we can just conclude that genjutsus don't have a powered up or powered version. It's just what it is. nothing more nothing less.Itachi showed that he did not want Sasuke to escape the genjutsu by making it more believeble yet violent. But Sasuke escaping it was not in his plan.