Yes of course, but it's nevertheless good for small (but important) things you've always been curious about but can't try in person. Like maybe you think Fire 4 is really cool and are considering a BLM, but you realize you hate juggling Enochian for it. I won't even get into how MCH and BRD flip playstyles completely at 52.

For those meticulous about hotbar management, another benefit of PotD is it 'gives' you the tooltips for those skills ahead of time - which could be weeks before you actually learn them for real outside of PotD. It lets you do things like figure out how to arrange them on your hotbars ahead of time, which means when you hit 60 for 'real', you're ready to go instead of having to spend a day or two figuring out a hotbar setup that works for you. Just be careful not to drag them off, otherwise they'll disappear for good and you'll need to go into PotD to get them back again.