Schiit Freya plus. Is this an upgrade?

The Schiit Audio site still has them in stock, apparently, while the Freya+ is listed as in backorder status.  

Things I like about the Freya+ is the jaw dropping audio quality.

True balanced design for my Gungnir

The volume knob tracking with the remote 

The 3 modes of operation is a stroke of genius

The looks are really something, no screws on the top plate.

I'm considering the Freya+ to replace my Onkyo P-3000R preamp. The main reason is the Onkyo doesn't have balanced outputs. ATC that makes my amplifier highly recommends using balanced whenever possible. I emailed Schiit and they responded quickly saying the balanced should only be used for monoblocks and that I should use single ended. I'm sure they know what they are talking about but I'm just wondering if any of you can explain why this would be. In other words why I shouldn't use the balanced outputs of the Freya+ into my amp. Just trying to educate myself on preamp/amp compatibility regardless of which brand I use

I think they say this because you HAVE to have mono blocks in order to use balanced with THEIR amps. Vidar and Aiger only have one XLR input.

I use Balanced with my Bryston 4B3 with zero problems. Not sure where this is coming from. Running the Freya Plus for 1.5 Years