From what I've seen in my own playtesting and watching replays from daily events where people play the deck, the main problems of the deck are:
Delver (and Pyromancer to a certain degree), SFM/Batterskull, legendary fatties cheated into play (Reanimator/S&T), Elves (and maybe JMS).
With white being basically cut down to the point of running 1 KotR and 1 Teeg from the board (Karakas could be seen as colorless land for the utility factor), I seriously question the white splash in favor of a red splash for Punishing Fire (maybe 1-2 Words of War if you want to be fancy, assuming it would turn out good) and sideboard sweepers. I'm not advocating cutting black for red, I suggest running red (instead of white)
alongside black to combine the advantages of both. If we go in with this premise, we might be able to clear slots for the PF engine.
PF kills Delver, Pyromancer, SFM (also Batterskull with enough mana), random Elves and Planeswalkers. That's alot of problems it could deal with effectively. We keep black for AD and dealing with TNN. KotR is good and all, but doesn't really solve those problems.
I know that the possibility of using KotR for utility lands from the board is cute, but with only 1 MD KotR that takes ages to get everything online if you have to GSZ for it seems rather slow. Which lead me to this crazy idea:
Crop Rotations in the board to fetch Tower, Karakas and Bog. Yes, I'm fully aware that it's a major disadvantage if it gets countered and that it doesn't work with CotV @1, but I think of it more as a cheap "OH SHIT!"-button when they try to reanimate stuff early or jam down noodle monsters and bargain demons. Tabernacle could also be a target against various decks IF the Crop Rotation plan works out. Would also work to find Groves, but that's a minor concern.