The timing of the reduction must be more than in part due to the imminent Sony announcement. Whether RED reduce their price or not, rental rates will have to be reduced if a cheaper Sony camera hits the market that comes close to the Epic in quality. You can't seriously expect Red not to respond to competitors in order to protect your investment when your camera's value will be hurt by external companies whether RED do anything or not.
You should just be glad for the opportunity to upgrade to Dragon so your camera can continue to bring in rentals. Imagine if you were any other companies customer at the time of a new announcement? No freebies against accessories for purchases that took place in the last month, no upgrade path, and instant huge devaluation.
You are probably going to be out of pocket but it could be so much worse.
When push comes to shove, you and your clients have a camera that was used on Prometheus and Hobbit - and it is only going to get better.