Who would even come and takeover for Amorim? The only profile I can imagine would be a mercenary only in it for the money or a former player who is misguided enough to think they can have a positive impact.
Allow me to vent for a bit. Logically, what I'm about to say doesn't make a lot of sense. Nonetheless...
United got bailed out last year by 3 newly promoted clubs who were completely overmatched by EPL competition. Amorim has won 24% of his EPL games thus far. I've seen nothing to suggest that's going to improve which would put United on about 35ish points for a full season depending on the exact number of draws. If recently promoted teams aren't titanically bad again, that's relegation battle material.
Basically what I'm saying is that the game next week against Burnley is a relegation 6 pointer.