I genuinely don't think any of these cards will be playable except possibly for the Gadgetzan one since it isn't a disastrous outcome to lose the joust on it, being a 1-drop, and is a reasonable alternative to Chow since it can't be rendered a completely dead card at any point the way Chow is anytime your opponent benefits more from 5 healing than you do from a 2/3 minion on the board.
All the others, when losing the joust, are so bad you wouldn't want to make that play in arena, let alone constructed. The healing and taunt ones are particularly useless as you frequently play heals and taunts at times when they save your life, and therefore lose if the joust doesn't resolve.
I really wish they'd stop heaping ultra-RNG cards into the game.
