"If they are too popular for too long, we will do something about it..."
No you won't. Blizzard has NEVER made timely adjustments. In fact, changing the problem NOW would be a GROSS mistake, considering the bulk of the problem rotates out very soon. You even mention the problem...
"On the other hand, when you lose to Tunnel Trogg, Totem Golem..."
These were cards made to help combat aggressive starts in the GVG/Naxx era -- Shielded Minibot, Leper Gnome, Abusive Seargeant, and many more chargers. The bulk of those aggressive cards were nerfed or rotated out at the PRIOR to the start of last year's Standard season. Yet, Totem Golem and Tunnel Trogg were untouched. Were you really surprised that Agro Shaman became the best deck from the get-go?
And the deck that came up to challenge them was ... Dragon Warrior, which reigned supreme for most of last summer. It also had a grossly overstatted 2 drop that was made in the Shielded Minibot era (Alex's Champ).
Here we are a year+ down the road -- and you're honestly surprised that Pali and Hunter are the bottom two classes, and Shaman and War had an incredible year?
P.S. People also pointed out that you didn't supplement Hunter and Pali's loss of early game -- while leaving Shaman and Warrior's early game intact. But that's not even the WORST PART OF YOUR DUMB-HEADED DESIGN DECISIONS -- you've been SUPPORTING Shaman and Warrior EARLY GAME THAT ENTIRE TIME!!!
(Spirit Claws, Maelstrom Portal, the entire Pirate package, Bash, Blood to Ichor, the list goes on...)
You literally gutted two classes. Didn't compensate them with anything. Didn't bother to tone down the early game cards that were remnants of the previous more aggressive season, and in addition, gave them EVEN more early game.
And you are just pointing this out now...