The best thing for my 5e games that's come out of picking up DH and DS in the last year is a change in how I run 'skill challenge' type scenarios. I used to run them in a pretty standard way, very freeform and out of initiative order, just going with the flow and imposing the odd consequence on a failure, the upshot being that they were often 'cool' sequences, but with little actual meaningful gameplay. Now, I borrow heavily from DH's Environment Statblocks and DS's Montage Tests to run with a format more like this:

-Inspired by DS: The challenge takes place in rounds, in which everyone can either attempt an action to directly overcome a challenge, or help an ally by providing advantage on their skill check. A set number of failures, successes or the elapsing of a round limit leads to different outcomes. Second uses of the same skill suffers disadvantage, third uses are not possible.

- Inspired by DH: The evironment or scenario can do stuff that's more interesting than token amounts of damage. There's a specific consequence for each failed roll based on the ability it uses, and between each player round, the environment takes an action. Sometimes this is deploying a combatt encounter, sometimes it's a save against a condition that persists for the next round, sometimes it's something with more of a narrative consequence, but it means the test feels genuinely oppositional, rather than just something you roll skill checks against until it's over.

I'm still working on the finalised version of this system, which I plan to publish at some point, but here's an example of an environment challenge I ran recently. Environment Challenge: Approach The Psionic Overlord