Hmm, if you are saying that ribbons have a greater HF response on the "wrong side" as a general rule I would like to see some evidence of that? Polar plots for example.
Most ribbons are symmetrical about their vertical axis and so, all things being equal, will have a symmetrical response. There are variants. The famous Coles 4038 has the iconic depression in the case (which is to correct diffraction effects at HF and smooth the response hence I doubt anyone would use a 4038 OTHER than the right way!).
My Reslo RBs have magnets across the back of the ribbon and pads to allow close talking, (see Cavern shots!) they are surely going to be dimmer from the wrong side?
Bit OT but. My Reslos are 30 Ohms and so I bought a 1:4 lifting transformer from Sowter. Works a treat and gives the ribbon about the same sensitivity as an SM57. Unfortunately modern ribbons are usually 150-200 Ohms so you can't do the same trick. A 1:2 traff would give you a 6dB gain (and less noise) but at 40quid a pop you would do better to put the traff cash toward a Fethead or Cloudlifter.
Dave.