Layering exploit is real - Guy has 160,000 gold in Arcane Crystals

[Roxía-kelthuzad (Roxía)]

Check out the blue’s respond

Layer switching is the problem, not layering itself

We’ve been monitoring players’ use of layers, and we agree that we should add a delay between subsequent layer transfers. Under the hood we have all the controls I talked about in the Reddit AMA before launch, a few secret weapons we haven’t discussed publicly, and we’re working on deploying some additional controls to further restrain layering from being exploitable. However, we also want to assure you that the issue is a much smaller problem than some people are claiming. We’ve been closely…

tl;dr - Classic is not in big trouble as you claimed.