I emailed Schiit on the topic of Freya+ and tube current, and they got back to me in a few hours on a Saturday. Other places that I email on a weekend don't respond until the following monday or tuesday.
On the tube circuit and the life of the tubes when not in tube mode, they said this:
From that I gather that tube life will be extended if one disengages tube mode. This is a 100% improvement over the 1st gen Freya. However, some current will still affect the tubes, as long as the unit is on. Good to know.
On the tube circuit and the life of the tubes when not in tube mode, they said this:
The Freya + has a tube shut off mode, so the tubes are off and it will preserve their life. There might still be current running through it since they are in the signal path so it might affect it somewhat, but the tubes will not be on at least.
From that I gather that tube life will be extended if one disengages tube mode. This is a 100% improvement over the 1st gen Freya. However, some current will still affect the tubes, as long as the unit is on. Good to know.