Thanks!
These changes are added to the deck.

Adding Janalai might be right if you often have to play in the late-game against slow opponents.
The outcome of my games was often determined until the late-game, though.

Congrats!
I got to rank 2 and felt confident that the deck is able to conquer the legend. But now stopped playing, not enough time.
At first I played with Arcane Intellect but then replaced it with Loot Hoarders. Probably should follow your list and put AI back.
I agree about Safeguards – they can be repalced.
Not sure about Fire-Eaters – it seems that they are useful.
Thanks for the comment, I will add your considerations to the description!

In my view Evil Cable Rat or Messenger Raven don’t fit the deck. If you face lack of value consider adding Archmage Arugal.
However, I think the true problem in matchups against Mid Hunter and Zoo Lock is to be found elsewhere 🙂
And you can try Mecharoo. I tested it but didn’t like too much. In this case replace Safeguards.
I think that Daring ire Eater is useful in this deck.

I played a lot of games with this deck, Big Shaman and other control versions.
Feels like this deck works better against aggro, notably more confident against Tempo Rogues and Token Druids.
The deck has more midrange and sticky minions by which you can control the board.

Safeguard plays a significant role in stalling against aggro. In such matchups it’s very good to get it from Muckmorpher. If it survives you can put Ancestral Spirit on it, or you can do it on turn 7 immediately. Often time this will mean victory.

Of course, it’s bad to muckmorpher Wargear. The chance of hitting it is about 10% and you have to put up with this probability. 5/5 buff gives a lot of advantages.
Similar situation with Missile launcher. It finds its place in this deck mostly because of its magnetic effect. But sometimes AOE effect also might be good.

There are not so many good deathrattle or mech cards you want to put in this deck to make synergies work – have to choose from the available options.