> 1. not shipping it with the Blitter from the start so it couldn't compete on games, obviously with the Amiga but even with 8-bits of the time
I don't think a blitter is that big of a deal, especially for games. A sprite/tile architecture would be better for games.
I wish that the ST came with the YM2203, instead of the YM2149. That would make it an even better machine for music, with the addition of 3 4-op FM voices.
Once clockspeeds got up to what the Falcon could do, it was unnecessary. But again, too late.