Once your whole team dropped to like 25%, its really hard as a disc to catch up!
But against Comps like WMD/KFC etc. you can play disc, thats right. Against this type of comp, disc isnt significantly better or worse then holy.
Played some disc myself this season, but ended up playing holy since its the better spec in general.
But i wish you success and alot of fun with the spec you enjoy!