These weather effects was nerfed at least 3 times already. And there are still people who whine about them.
But it's not about the effect, it's that the effect effectively brings nothing interesting to the table outside of combat, and thus isn't interesting from a non-combat perspective.
If all I want to do is travel halfway across the map, and that takes 4 times as long because there happens to be a thunderstorm in play, how is that an interesting game mechanic?
It's interesting in combat because it makes you consider different strategies, because your melee characters can no longer reach enemies as easily, for example.
But outside of combat it is literally just a 'this takes longer' effect. Even if the effect is reduced, that doesn't solve the problem, it merely reduces it.