I’m about four months too late (The Witchwood is about to be released), but I’m nearing the completion of the “single player mode” for Kobolds and Catacombs. Unlike past adventures and expansions, you don’t have to play any heroic bosses, but rather there is a unique single player mode in KnC. In this mode, you have a rogue-like experience where you start with a few cards in your deck, then build up your deck as you beat the bosses. You also get special treasures until finally you face off on boss #8. The goal is to beat the (random) bosses with all 9 classes.
I’m not there yet, but I only have 2 more classes left (Druid & Priest, although not tackling them in any specific order). I enjoy this mode and actually played a lot of it when this expansion came out. It took awhile before I mastered the mechanic and started clearing the classes, and there is still no perfect/repeatable solution (hence no blogs on each individual class). There’s a lot of RNG involved in getting the right treasures to build a deck that has OP combos – and then some more RNG to pull it off against the final boss.
Overall though, I find it much more fun than fighting heroic bosses. One reason is because the challenge is in piloting the deck, not in creating the deck. There’s a lot of back and forth that you have to do to tweak a deck to fight the heroic bosses and that takes away from gameplay. With this dungeon mode, you just keep making choices and playing!