Dude, you're about 18 months late to this conversation. In short, you are wrong. It was the best move for the overall health of HS long term.
If they didn't introduce the rotation then we would have the problem of always having to get new, more powerful cards to replce the best ones from the prev sets. So there's a chance people would still be running Piloted Shredders and Shielded Minibots. Unless they actually gave us cards that are more powerful than those which would be ridiculous. Same for Totem Golem, Haunted Creepers, Nerubian Eggs, Emperor T - the list goes on and on. You cant just print more powerful cards to replace others. I mean how do you make a 3 drop better than Muster?
Rotation forces the meta to change and shift and that's a good thing. Yes it does get stale like a month after a new set but that's a different problem. Imagine how stale the game would have been if we never had a rotation in the first place.
Aside from tons of salt your post offers nothing constructive. Wild is actually awesome and there's a great variety of decks on the ladder from ranks 15 to 5. But you either don't play it ever or you're one of the top legend players where yes, there is less variety. I know which one my money is on.
Saying that the devs are lazy etc is a rubbish argument. It's not even an argument actually. They do their best to balance the game. Sometimes they make mistakes but they're getting better at reacting quicker and fixing things when they notice it. Now people will jump to Barnes nerf three years too late but the truth is, Big Priest's win rate isn't an issue ito power. It was just super crap to lose to. Anyway, this conversation is so 2016...
ANd here in wild meta no one's running piloted shredder nor Muster for battle while the 3 drops of choice are Flying Machine and Kirin Tor Mage, plus the Renodeck staple neutral legendaries like Brann and Zola