I believe the stock Avid pads are actually called "semi-metallic" (yours) or sometimes "organic" is used, not a full-on metalic pad like the EBC Gold. The minor scoring seen in your rotor photos appears to be normal.

Try installing the ICE rotor with a set of new Avid pads (do not reuse the old pads with a different rotor) if you have them, which will produce less wear on the rotor than full metallic pads. Thing is, the ICE rotor produces much less heat, so the default Avid pads work better and should last much longer.

I've only ever replaced one set of semi-worn Avid pads just because a couple years had gone by and wanted to test performance with a few other types. We seem to get very extended usage out of our stock Avid pads and my stock of spares remain in my parts bin for ages. Regardless, if we were planning a decent of Mont Ventoux I'd swap in the EBC beforehand.