Ice bolt is definitely an option over the other 2 cost removal if you're feeling that Rindra's or Favor is unnecessary. Nullblade to market is an option if you're encountering a lot of katraquill. Crow gets you market fodder - use chacu and vara + recursion as finishers as usual, otherwise simply keep control of the board. Hailstorm can replace Eilyn in market if you're finding a lot of aggressive cards. Mirror image is definitely a maybe in this deck - I've found it can often be a dead card in hard but it's also huge with a finisher, or a merchant. Discarding a unit with Honor of Claws can be Dark Returned into your hand again. Rindra can be cut entirely, I've just found the lifesteal blockers to be invaluable with a slow start.
Looking for feedback and thoughts - this is definitely a unique take on Feln but it's gotten me 13-3 in Diamond and the tech cards here, IE poaching drake and R choice, have been exceedingly useful!