Seems like 90% of people favor the CA version. And it doesn't sound like just nostalgia, or wanting to re-experience something that has been away for a few years. There is definitely interest in Soarin' Over CA, and given that, it seems dumb that they plan to put it in mothballs again at the end of June.
The compromise solution would obviously be have one on each side, but I wonder whether Disney would do that. I imagine if they did, based upon comments, the CA side would be much busier than the World side. If that became significant enough, it might even force them to consider dumping the World version altogether, and it appears they are reluctant to do something that drastic.
Sometimes Disney listens, and acts upon guest reviews. It will be interesting to see if they bother to do that in this case, or if this move was purely designed to bring guests into CA Adventure during the opening month of Galaxy's Edge.