OK, let's say we sell them. Who can we feasibly replace them with? What left winger is there in world football that can replicate what Rashford does for us, without breaking the bank for Vini, Mbappe or someone of that quality? An option could be Neto, and have him on the right and Garnacho on the left.
Bruno is a harder one to replace, because he's very unique in the sense that he's equal parts frustrating and equal parts mercurial, often within the span of 5 minutes on the pitch. Florian Wirtz or Lucas Paqueta I think could fit the bill, but you're staring down the barrell of the guts of £150m for either + Neto, and we have other glaring holes in the squad that need addressing this summer and next.
The other route the club can take is recruiting guys that may fit the bill in terms of accommodating and complimenting Rashford and Bruno. This is kind of why I didn't understand selling Fred when we ultimately replaced him with Amrabat. Like can anyone honestly say a midfield of Fred and Mainoo doesn't look like it would gel OK on paper? Fred had a great engine too and often covered for Rashford's lack of tracking back on that left side. Fabinho and Henderson often did the same for Salah, who has zero interest in tracking back too, but admittedly has the attacking output to justify it. Rashford doesn't currently.
A midfield of Bruno, Mainoo and McTominay leaves literally Mainoo as the sole player capable of caressing the ball around the pitch and being open as that first receiver. If we had another Fred-like player, but was more technically gifted and looked after the ball, all of a sudden you have 2 CMs who can pick it up from deep and find Bruno in those final third pockets consistently. Surely there's a player capable of doing that and is available for a reasonable fee?
Similarly, we've missed the influence or Martinez and Shaw down the left, who are capable of dovetailing well with Rashford and showed that last season, with Bruno pulling out there and forcing those overloads for us to exploit. So do we need to rip that up, or just get a reliable LB and another CB to partner Martinez who is good on the ball and is comfortable playing a high line and condensing the pitch, so we're not seeing those wide open spaces that expose our lack of tracking runners.
We may not ultimately ever win anything of serious note with these 2, but they'd be a good bit down the pecking order when I'm looking at who needs to be replaced in that squad.