There are now updates available for these amps at https://support.fender.com/hc/en-us/sec ... ONE-MASTER
Essentially, these are choices to do with the behaviour of the Reverb control, and, for the Deluxe, removal of the treble boosting cap simulation on the Vib/Trem volume control...
The original settings are also available. The update procedure is easy and the Reverb mod is good.