One big issue I see, is that they gave the thief a way to compensate for the undercutting of cunning action, but not the rogue class as a whole. I'm planning out a detailed post about cunning action and a proposal on how to improve it.
I hope your post reaches Larian, the undercutting of cunning action alone is a huge hit to the usefulness of the rogue. Fixing any one of these things would help greatly, it's just having all three problems combined makes the rogue almost pointless.
