My main point is that while we can point out any number of factors and groups external to the pro-SGRA folk that might be causing them consternation, we are very likely on the list of Potential Negative Backlash sources, too.
Very, very, true. I still think there is a chance that SGR might be new companions only. If that's true I don't think anybody would be happy about it.
Aside from that I would be surprised if they didn't have some research on potential player loses (i.e. how many people that can expect to quit if they do put in SGR) that shows enough of a loss for them to want to wait for the last minute to announce. I doubt they'll really lose that many people over it, or that it would stop them implementing it. Just that there is no point chasing away subscribers and their money while they're still depending on subscriptions.