After finishing the game with 68/77 secrets, I found myself wishing for something similar. For example, it would be really nice to have a 3/5 type nomenclature on each map to narrow down the missing secrets just a bit. I ended up just looking at the atlas in the hints forum to see what I missed, but there's very little achievement in that of course. As an aside, there was one secret in the Bog that I would have NEVER found (well, unless I knew there was a secret somewhere on that map I guess).
SpoilerShow
It was that bush across the little pit that was blocking a pressure plate.