I thought this was quite interesting (it's for last season, so Martial is there but Ronaldo isn't).
Rashford pretty much spends more time sprinting at full pace than anyone in the PL. Goes some way to explain why he doesn't press very much - it's to conserve his energy in between bursts forward.
That's not to say it's right. I think Rangnick would ideally want Rashford to be in the same region of the graph as Salah. The Boro game might have been the beginnings of that, tbf.
That's because we've been a club that has no ideas outside of counter attacking for the longest time. With proper coaching and time, allowing our forwards to isolate defenders etc. as a result of proper build up play - I wouldn't be surprised to see all our forwards go up a level or two.
Rangnick is doing well in my personal opinion, but it's still very early. No matter who the coach is, it's going to take time for them to turn us into more than just a counter attacking side. We essentially have threw years away with the previous managerial appointment