So a few things I've figured out
1) You have to now give the arcgis server account editing privileges and versioning
2) You have to have no other layers in the service definition file except those you want to use in a feature service, so basically I had to create a new service with just the one layer I wanted to be a feature service. This wasn't the case in 10, as long as I didn't try to use the other layers as features there was no problem.