1. Unless I'm mistaken, autorcm is just the corruption of your boot1/2 files causing the switch to automatically enter the recovery mode and await a payload, updating emunand wouldn't affect it, it's updating OFW that does that since it writes to and possibly repairs said boot files.
2. If you have Emunand and the latest SXOS beta build, I don't see any reason to not update to 7.0.1