Why can't you edit it now?
Been playing it a couple days now. So far, I've only managed to get it out three times and never got deathrattle to go off - they conceded after or before one more turn lol. That said, I am also unsure as to whether it will stay in the deck for me for most of the same reasons as OP. I HAVE been winningn a good 70%+ of games, so maybe it would just be insurance to find something more efficable!
Been loving this deck for a couple days now.
Personally, I only find difficulty when I make panicky decisions after getting a number of unlucky high-cost cards after a high-cost draw/mulligan. I definitely see better outcomes when I manage to keep my head the few times I get a series of poor draws. Riding it out and banking on the deck offering up what is needed to not only survive but win is exciting. I will say I don't seem to get the best value out of Ysera as I'd have thought, but I'm keeping it in for now to see if I can work on better planning being the issue.
This deck is not only strong and well-planned, but it is a really fun deck! I enjoy the different little combos and mechanics it offers. I always get much more satisfaction from a deck that plays with multiple kinds of combos and different fun answers as opposed to the tired old OTK stuff.
Thanks for your work!