Your definition of who's good at wilderness exploration is very...specific? Again, 4e rangers get 5 skills, with Nature, Acrobatics, Athletics, Dungeoneering, Perception, Heal and Stealth among them.
For comparison, the cleric gets 4 skills, 1 of which is locked to religion, and they only get access to Heal, of the skills I listed above. The druid is better, getting automatic Nature training, and 3 other skills, with Perception, Heal and Athletics available as options. So what? Why wouldn't the druid be good at wilderness exploration?
About wisdom, the difference between an archer ranger and a cleric is probably going to be one point of modifier, two at most, and the ranger will have far better stealth. Yeah I'll take the ranger any day.
Maybe you're judging the 4e ranger simply for the lack of ritual casting? Ritual casting can be easily acquired with a feat...and feats are a dime a dozen in 4e. It's not even needed, you generally only need one ritualist in each party, but if you really want ritual casting, it's cheap as hell.
In short: we played 4e A LOT back in the day, and had plenty of rangers PC in the role of wilderness scouts for the party. They were highly effective.