snip

It is neither a bodge nor a fix. It is a way of using a resource that
would otherwise be wasted - high frequency headroom. An exactly
matched amplitude/phase curve is exactly equivalent to flat frequency
and phase, and there is no problem whatever in making that match.

Oops, missed a bit!
Why would you wish to perform two unnecessary conversions?
How can you be sure of an *exact* match?
Surely it is unwise to add any unnecessary circuitry.

Paul