Since this was not done, the AGA chips were crap compared to what was in 1992 in PC, Mac, Atari.
Because the Aga chips were crap, the external graphics card based on pc chips were in Amiga absolutely necessary.
I am sure this isn´t Dave Haynie´s fault, but it was indeed a problem. Remember that Amiga had it´s place as a multimedia powerhouse in the late 80s. People knew of the great stuff you could do with it. Yet if you went to a store in 1993 you would get the impression that GFX on the PC were more advanced, because they were running slideshows with better monitors and higher image quality. They couldn´t really show something that moves, because it was still too slow, but the customer didn´t know that.