Sanchez choosing United comes down to him wanting to get out of Arsenal right now... not the summer, not one year from today but right now itself. The environment has become toxic for him as his teammates don't want him at Arsenal. Pep possibly told Sanchez and his agent to stick it out for 6 more months and we'll give into all your demands. City would have given the 30m or so that was supposed to go to Arsenal to player and agent for coming to City for free. That's where United comes in. They are willing to play Arsenal and his agent fees to get the player right now. Matter of fact is that Pep does not really need him right now. The title is practically in the bag even though they lost today. Sanchez would only be brought in to better their chances of winning the Champions League. So for people to say that Sanchez is coming to United for the money sounds preposterous since Sanchez agreed personal terms with City over the summer. It is Arsenal who want more and if United are willing to pay Sanchez a little bit more to secure the deal, why not? Sanchez can play as a winger a No. 10 and also fill in for Lukaku when needed which is why this deal is the best possible one that United could get at the moment. With Griezmann, there was always this doubt whether he'll play well as a RW and the same goes for Dybala and not to mention, they would cost more than 90m. 35m for a PL proven world class player is the best piece of business we could have done.
All we need right now is a CM that would help Pogba dominate and release him. Matic has been good but we need someone more dynamic in that sense.... Jorginho/ Weigl/ Fabinho would all be great options. A proper RW.... If we are penny pinching, a quality winger would be Mahrez who would come for a price of 50m which is relatively inexpensive in this market.