I think if you really want to get out of the contract this will be a good excuse and timing. I am sure DISH considered this factor before they turned off those VOOM channels.
For whatever the reason, VOOM is not doing it for DISH, can't blame them for trying to terminate the service. Now the only way I can see this happen for the good of the VOOM subs would be Cablevision/Rainbow agree to consolidate all VOOM channels into 5 or less channels just so DISH will keep them and still save some precious bandwidth spared for other new HDs.
Maybe this is what Charlie is trying to do, but I am not holding my breadth on it.