There was a good reason for line level out.
Seems a bit redundant when they already have 7 dedicated headphone amps.
You are correct - that is my point. It seems Schiit designed Saga and Freya
exclusively for speaker listeners, making no concessions for headphone users. As a company that built their reputation on headphone gear, I find that baffling.
Having the second pair of attenuated line outs is convenient for the few that also run sub(s) with their speakers (not withstanding that a lot of active speakers already have sub-out circuits built in). But look at it this way: it's a lot easier to get splitters to run two sets of speaker amps than it is to retrofit either preamp with a fixed line out.
Any time you pass the signal through unnecessary circuitry you change (degrade) the signal. Why run the signal through two sets of volume controls if you don't need to? The line out bypasses the volume control, thereby passing on a purer signal to your headphone amp, where you can control the volume independantly.