I definitely like this deck. Really nice pick up on Reflection Elementalists! I've been thinking about them, but they are pricey these days. They fit really well into your deck, though.
I'm using Heroic Brawler in my strength-steal deck, too. It's pretty nice. Today I tried playing with Sneaky Bruiser after seeing it in the top meta decks. The key is 4 HP, which survives Shaped Blast. The perma-hidden is also nice. It plays like a safer version of Heroic Brawler with no growth upside. You may want to give it a spin, but I do love HB!
pricey - And I am thinking about 2 Shadows of Lethenon and Hierophant Silenus. Expensive but still affordable. But no ETH for that :)
Sneaky Bruiser - A good idea to play it in the way described above, I'll keep it in mind. Since it is hidden, you can wait the next turn (in case you played it on mana 5) to buff it. But Heroic Brawler is more versatile and growing if alone, and better against Nature. There are things to think about... And I am thinking what to play in case Deception floods Meta, let's say, in a week. Big beasts is a potential choice :) Just bought a Territorial Dominion.
That's a great point about Territorial Dominion. All of a sudden your Overgrown Rhino can hit their Armor Lurker or other annoying hidden creatures.