I see no difference in tactics. Like someone said, they were taking base prior to the werble. I have found my accuracy is much better in the Osty than it was. So far this camp I have killed many IL II's with it. If you hit a wing or tail they go down with one shot.
Besides there are ways around the slow turret. One person suggested leaving it in first gear and just use rudder controls.
You are correct about the vulching part. People stayed away from bases. The other day, when there was a great opportunity to tear down a town and capture the base they instead chose to de-ack the field and vulch.
I looked at the K/D ratio between this month and last month. It's dropped from 1.95 to 1.69. Be interesting to see next month's stats.