Warmaster Horus
Explorer
I agree with all your points, Celtavian. I've found that the most potent weapon for PCs when fighting monsters w/ higher CR is surprise. Getting a round of surprise attacks helps whittle them down and has often meant the difference between success and loss.
But 5e requires a different tactical approach than previously. Hit points are not easy to recover quickly once lost, especially mid-combat. Bounded accuracy means hits are more common at higher levels because offensive capability (prof ratings, stat bonuses, etc) scale quicker than defensive ones (AC), so more HPs are being lost. If you can get into position to hit, that is.
But 5e requires a different tactical approach than previously. Hit points are not easy to recover quickly once lost, especially mid-combat. Bounded accuracy means hits are more common at higher levels because offensive capability (prof ratings, stat bonuses, etc) scale quicker than defensive ones (AC), so more HPs are being lost. If you can get into position to hit, that is.