I guess they are never the same in any one place nyx
For me I find a lot of referances to the Pleiades being to do with
a womens lot more than seasonal change .. much like above .
Australian Dreaming (landsdowne press 1980)..
Stars in the sky .A.E .wells ..( university press) 1973 ?
and buy accounts is a fairly common theme throughout the country
I can SEE that seasons change would be a part of a dreamtime story
but its simplistic to look no further.
The night sky and art was/is ..imo ..just a visual aid to the spoken word and as such can't ever be really understood .
I love the crux as a stingray though follow the tail down and see the barb at the end .. with two hunters in there canoe paddling down from above