Multiple players in the years since have described the massive influence and control Querioz had on tactics and tactical preparation under SAF.
For example, in Giggs' autobiography he says Queiroz had “large amounts of responsibility” within the club, and had been entrusted to “train us, prepare us for games, organise the team and decide the things we need to work on."
John O'Shea on Queiroz' role: "He has worked very hard on giving us different ideas about how to kill a game off and how to expand our game to get from defending to attacking very quickly. I think you have seen that on lots of occasions, but also having the patience to keep the ball because in Europe the teams are so good that you do a lot of work if you don't have the ball."
Taking specific games as examples, all of Giggs, Carrick, Evra, Neville, Silvestre and Rooney described how it was Queiroz specifically who prepared them tactically for the semi-final games against Barcelona. Taking a few of their quotes, here's Neville:
"Queiroz's daily routine before the Champions League semifinal against Barcelona in 2008 was to put sit-up mats on the training pitch to mark exactly where he wanted the defenders to be to the nearest yard....For years, training had always been based around how we’d play, but this time Carlos was obsessive about stopping Barcelona. We'd never seen such attention to detail. We rehearsed time and again, sometimes walking through the tactics slowly with the ball in our hands."
And here's Evra:
"I remember the semi-final against Barcelona away when he was speaking with everybody before the second half. The team felt very strong at Barcelona and this was because of the work of Carlos Queiroz. Tactically, he brought something very important to Manchester United."
And Silvestre:
"I think it was something that Carlos brought to the first team. It was lots of drills and tactical positioning, knowing when to shift and when to put pressure or drop, because Barcelona can break very easily."
And Rooney:
"Whenever the manager was following his instinct and thinking "we're going to attack", Carlos would make him rethink. He was the one who gave us the tactics in 2008 and was the cautious one we needed."
Oh and here's Ferguson himself (while talking about Henrik Larsson) casually mentioning that Queiroz delivered the tactics briefings:
"He wanted to listen to Carlos (Queiroz), the tactics lectures; he was into every nuance of what we did."
So yeah, I'd say all that comes under the heading of Ferguson relying on Queiroz to deal with the tactical specifics, which is what I said.
Maybe try easing up on the name-calling when you post next time. That way you'll look like less of a jackass when you're wrong.