In our FTC swerve drive, we found that the deadband point at the rollover in continuous pots were too large for the sensors to be used effectively. I'm not sure if this becomes less of an issue at FRC scale, but it is something to be mindful of.
I know several teams have used absolute encoders, like USDigital's MA3 (
http://www.usdigital.com/products/en...tary/shaft/MA3) successfully, but I have no experience with them.