Both Falcao and Scholes are the midfield maestros in their best incarnations. That is where the overlap is, unless you use the young version of Scholes, but if you do that you don‘t get his elite build up play from deep like he did in his later years. He was not that all conquering force in his younger years, more like an AM/SS. But he did not play this role at an All-Time level like Maradona or something.
Again the overlap is between Falcao and Scholes, not with Makelele. I hope you are not saying that Falcao is like Carrick because that would be like saying that Xavi is the same player as Busquets.
Regarding your point of Scholes against Barca 08, that was not a great Barca side at all. They finished third in La Liga on 67 points behind fecking Villareal that season and only when Pep came in, he completely transformed the side and made it the juggernaut we all know from 2009.
You don‘t have Makelele stopping Robson because if you do that, Bergkamp is gonna run riot in that gaping hole in front of your defence. Bergkamp-Henry-Romario vs Vierchowood-Ruggeri is just gonna end one way.