Yep, I like that as a solution !

I always worry that Perception rolls (or Spot rolls in 3.5) are made too frequently. I appreciate that's why 5th Ed bought in Passive Perception, but that's a mechanic I hate because I've seen it misinterpreted or abused too often.

So for the majority of the time, I view anything that happens as either so obvious anyone could see it, or so discreet that a character has to ask a reasonably specific question for a purpose and then roll for it. Not "as I walk down the road, do I see anything odd ?", but rather "as I walk down the road, is there any fresh night soil, or does it all look more than a few days old ?"