Kanaya and Feferi, awesome as they were, did not die in vain. For they were instrumental in engineering the best Karkat facial expression ever. And look on the bright side, we're technically only in a -2 troll deficit since Aradia recently came back and all.
Also, i'm not *incredibly* surprised at the turn of events, though it worries me that it signals the approaching end of Homestuck with characters being picked off left and right.. A volitile mish-mash of personalities, castes, and sociopathic tendencies armed with overpowered weapons in a secluded place, knowing that you're the last living members of your race... someone's bound to die sooner or later.