Vael
Legend
My experience was this got better when they rebalanced monster math. MM3, Dark Sun and Monster Vault monsters were much better than earlier 4e monsters. And sure, I'd say you have to up the monsters as PCs go up in tiers, but at least it was fairly intuitive and granular enough to allow for easy adaptation.It was clean conceptually, but it didn't work in practice IME. Particularly at higher levels. Has you increased level the monsters got relatively weaker compared to the PCs, but the encounter guidelines didn't accommodate this. So the encounter guidelines didn't really work for the full span of the game.
I have heard PF2 as a similar issue, but not as pronounced.