Let me first say that the driver for this is more about making money and generating interest which it has and will be.
With the jumper I see things a little differently.
I see the jumper as representing the SANFL rather than SA in general. The jumper is worn now by SANFL players, not what state a player classes themselves as being from. Even during the state of origin era, every player who has worn the jumper has come through the SANFL system (maybe a few exceptions). The crows was born from the SANFL, so i see the relevance.
They should have done it better though, like perhaps using the SANFL logo on their normal home jumper.
The power use the same design as the SANFL jumper on a permanent basis, albeit different colours. Before anyone goes on about multiple teams having stripes, sashes, V's, hoops etc, the 'Double V' of the SANFL jumper is rare. Nobody was up in arms when the power adopted it and rightly so, probably because all their previous guernseys have been rubbish.