If those orcs aren't going to get rebalanced it seems like there needs to be some warning that they are so high level. I don't know if I'm missing some interface element that warns of this, I think that's probably the best solution but if so it's probably worthy of a tutorial pop-up.
If you speak to the Orc who has the "burying my brother" quest, you'll note two things:
1) He's level 6
2) He has a dialogue if you threaten him to "...call my friends from down the beach".
It's pretty clear that if you're having difficulty killing him solo, you'll have issues with the later orcs. I found this refreshing, tbh: you'll go west once, get spanked, then leave that area until much later (for me, it was until I'd reached the watcher stones).
You know, like a proper RPG, not a linear hall of rooms with scaled enemies. Level scaled enemies = ruined Oblivion / Skyrim.
~
What was more disappointing was that there was no quest attached (you'd think the town would want the orc invasion force beaten), especially when you find the parchment
outlining their orders from their queen
This part I think needs some attention.