If Keane wasn't sent off and Calvert-Lewin didn't need to go off, I'd agree it could be seen as concerning.
But I agree with Lampard on keeping balance and Alli is a second striker, and without a striker - I can see why the only change he made was late on/Gordon on for a bit of intensity and to protect Calvert-Lewin's fitness.
But Gray stay on for 90? Richy too? You got to just go for those games. 2-1 down, doesn't matter if you let in another just go for that draw. West Ham were naff.