It's baffling why they choose to do this, I highly doubt it's laziness given that they're putting so much effort into Book of Heroes as a concept, so it must be an intentional decision on their part. Would love a developer statement about this one, to at least clear up the why
There's absolutely nothing wrong with enjoying these types of streams, don't let the negativity surrounding them get to you. I agree that people blow how much these streams "solve" the meta out of proportion, even if it does definitely speed up the process. Many players' favorite Hearthstone time is the period after an expansion where the meta isn't solved and jank reigns supreme, which is why many people are angry at the streams. However if people have issues with the streams then that is a problem they have with Blizzard, what any one player does is entirely up to them, and no online horde should have any bearing on how you enjoy the game :)
I wonder how this interacts with Archmage Vargoth, it should keep the two uses but what would it swap back to? If it swapped back to itself that would be a good meme.