"And what extreme measures are you referring to?"
Erasing memory, taking the risk of permanently damaging people or even killing them... I'd say that is extreme.
IF it wasn't extreme there wouldn't be any point to the movie.
"He wanted any and all memories of her take it from his view HE doesn't know if she was popular or well know and doesn't know who had memories of her but every memory helped his goal, is she knew a bunch of people he wasn't gonna go and ask all 6000."
Did I make an impression that I did't know what his goal was? Asking them would have been a difficult and boring task (plot-wise), but it would have got the job done well. My motto is: think of a good reason to be/do evil. Willing to sacrifice thousands of people for just retrieving memories of someone you loved is a poor and stupid reason that makes the movie much worse than it could be. Its something any idiot can make up in less than 5 minutes. Even Kayabas reasons for making a death game - up until now - were more plausible than this.
Yes it would have gotten the part of knowing who had the memories but than he still have to take them, so it would be more exciting to take all 6000.
"ITS A MOVIE ITS NOT SUPPOSED TO BE COMPLEX AND TWISTED you have 2 hours start and finish not 6-8 hours which is a ruf estimate of 24 episodes so you can't have some crazy plan...."
Yes, you can.
No you can't
"Did you even think on this one... They would need a WHOLE NEW PLOT"
And a new plot instead of this shitty one would be a bad thing?
Yes, some people enjoyed the movie, there doesn't need to be an explanation for everything in the movie.
"Are you ignorant? He wants to see his daughter again he isn't gonna scan his own memories just to forget her, like wtf think."
Those memories of the SAO survivors are nothing compared to his memories of her. So how do these memories reconstruct his daughter in any meaningful way without his contribution?
He as a father wanted to see his daughter, he did not want to forget her so he did not want to give up his memories, and the boy she loved in the game knew her vary well also and gave a large contribution to her memories.
"... How will you copy an electrical output in the brain in a small area that holds the memories of a conversation without hurting the brain? ...and did you watch the show the traumatic stress of taking a memory killed them... And they took memories from them maybe that was the only way."
Reference please. I only know of Akihiko Kayaba who would fit your argument, but thats a poor example. In the second half of the first season they were pretty close to controlling someones mind and they were able to implant and read memory on demand. Additionally it turned out no one got harmed by those experiments. So in other words, going by the lore, it was already possible to get their memory of Yuna without cooking their brains.
No, they were able to make them dream a good dream by triggering parts of the brain, I think you misinterpret, controlling someones thoughts is different than creating Yuna.
IF you want to continue this we can make a separate thread.