Should I sell my accuphase for this schiit

Should work great as long as the speaker are 8 ohm nominal and still fairly efficient.

Your answer is there, that it is taking a hit, and the proof for all the others would be comparing independent measurements of both mono and stereo. I bet it’s not the only parameter to take a hit.
Half the parameters that are affected that I mention above are encompassed, by saying "so log as the speaker is 8ohms"

Here’s a question you could ask Grover, would you be better to have an Aegir on the highs and a Vidar on the bass (gain equalized) , than to have 2 mono’ed Aegir’s

Cheers George

Well Schitt measures poorly, but then Accuphase does too.  So it's down to which is cheaper for me. 

@jcarcopo really? I thought accuphase was well respected quality gear ? I’m new to schiit, but everyone seem to think is great gear at reasonable price points 

@georgehifi i learned something new today, thanks. 

How well was this restoration process ?

Normally, solid state devices and resistors (except constantly moving pots, like a volume control) do not "age" significantly over time, unless they have been stressed and exposed to voltages & currents very close to their limits and/or exposed to heat.

Having said that ALL electrolytic caps, especially manufactured long time ago, WILL fail and some pretty catastrophically.

If you are sure that the restoration was made by a very reliable establishment, AND that the amp was not previously abused (used at max levels of its capacity very often) then the old amp should be just as good.

My worry however with old amps is always whether any of the output bipolar (most old amps has bipolar output stages) devices may fail (for whatever reason, typically too much heat) and destroy your speakers if there is no  speaker protection circuit (or it does not function properly).