I'm watching it in Holland, in a snow storm, on my CS8000 with 90cm dish.
12072 H 16666 3/5 pilot off
dvb-s2 8psk
SQ=65%
I'd say the effective beam is very narrow ( caused by the necessity of acquiring 8 bits per quadrature in 8psk), that means your aim has to be precise. It wouldn't surprise me if your 80cm dish was too small, but I think it depends upon location, as much as anything else. I'm replacing my 80 cm with a 1.2m motorized dish, and will keep the 90 cm dish up as well. I think you'd be well served to stick that Primestar on AMC21,

[currently our sustained winds are at 38 mph , gusting to 61 mph ]