I disagree with the position here that Zelda doesn't show you anything at all until you find this. This is absolutely not true. I think Zelda does find a balance, but it's a balance that will work for some people and not for others. I think the problem is that there's no way to predict how every single person will play an open ended game, and it is impossible to cater to every taste.
The problem will each region having a counter for collectibles is that it makes the game feel much more artificial. Yes, it would help people who are obsessed with collecting every last thing because they can sweep a region, look at a number, and then move on. But I don't think that's the intent of the designers here. They want people to explore the world if it is fun for them, rather than chasing numbers.
I've played the game for like 80 hours now, and I'm at almost 90 shrines, and less then 80 seeds. I have almost all the memories. Beaten all 4 Divine Beasts. Got the Master Sword. Cleared a bunch of optional areas. I still feel there's so much to find in the game. I don't go looking for shrines when exploring, I go looking for adventure. And I'm not knocking on people who want to specifically find shrines, I'm just suggesting a different mentality because I think that's what the game is designed for.
The game doesn't expect you to wander randomly to chance upon shrines. Sometimes that can happen and it's cool, but the game is designed to lead players towards shrines on the call of adventure. Which is to say, you want to seek out settlements, talk to people, hear rumors and stories to get quests, go check those quest objectives out, and in doing so you'll run into more shrines both related to the quest and randomly placed on the way.
Instead of just randomly going in a direction and just expecting to detect shrines with the radar, I pick locations based on what looks interesting on the map either from the topography, or from observing landscapes from a high vantage point. I look for places where something could be "happening" so to speak, and head towards it. 9 out of 10 times I end up in a place which is either and enemy hideout, a village, a stable, a town, or just some location of interest which ends up leading me to somewhere else of interest. I have never run into this dead end where I had nothing to do and was just aimlessly looking for something. Sometimes trying to solve a shrine quest takes longer than expected, and I get a bit lost for an hour or so. In that hour though, I'm always exploring a new region and filling up more named locations on my map and finding a couple of seeds here and there.
So yeah, I think Zelda does have that balance, but it requires the right mentality to be "perfect".