Kari Zev and Lannery have been great for me, and Repeating Barrage closes out a lot of games, but it's not necessary. 2 color version still does all the busted stuff, just a little slower and with less reach.
Also I really can't get over how good Hostage Taker is. Really want to go up to 4 copies, but can't justify that many 4-drops.
It's great how the only actual pirate lord isn't even the third best four drop for this deck.
Edit: Losing access to Unlicensed Disintegration and Lighting Strike definitely sucks though. I bring in enough negate and essence scatters in most games to not be happy playing Walk the Plank.