How many times have you found yourself revealing almost an entire zone only to discover that a 3-pixel box was covering the portal you needed? A zone you would have finished in 3-5 minutes turns into 15 as you reveal the entire perimeter looking for the way forward. If this happens once or twice per act, you could easily be adding hours to a campaign playthrough.
What if GGG increased the reveal radius of the fog of war on the map? I'm not suggesting anything massive like doubling it, but even 10% could go a long way. People have suggested smaller zones, more objective markers (some of which have now been added), or reducing monster speed and density to make the campaign faster. This is obviously subjective, but I think a slightly larger reveal radius could accomplish a lot without really changing the campaign itself. You'd still need to explore and figure out where to go, but you'd be less likely to miss an entrance you were already right next to.
The average player isn't committing zone layouts to memory, especially when they aren't completely static from league to league. This could make the campaign faster for the average player without cheapening the experience or ruining speedrunning. Campaign and zone knowledge would still matter. And I'm being generous when I say "average player" because I'm a PoE 1 no-lifer of several years and I'm writing this...
Thoughts?