I mean, it doesn’t look diseased or black or dying. Just a bit chlorotic...it’s been that way since I received it and actually has started looking better. I wouldn’t treat this plant any differently than what I have or with any disinfectants or pesticides/fungicides but cooler temps may help. That said, it appears that DC’s grow like weeds in FL from the pics he’s posted.
Here’s the foliage...it actually looks pretty solid:
Fragrant? Z. mackayi is VERY fragrant, but some of the more modern Zygo hybrids seem to have had the fragrance bred out of them so fragrance can't be assumed. The saturation of lip color is wonderful.