First chance to post after playing through the first area:
-The Nemesis system is fantastic. I don't have any epic anecdotes of personal rivalries yet, but the various orcs feel like they have distinct personalities, and I love seeing them get up to stuff without my direct involvement. The very first named orc I encountered was fighting Caragors and announced his retreat before I could even start attacking him! It's this feeling of NPC autonomy that really helps me forget about the gameyness of the open world.
-There's not a huge breadth of interactible environment objects, but those that are there are enough to allow for a lot of flexibility in approaching encounters. In another game, fighting wave after wave of grunts could get tiresome very fast, but the exploding barrels/beehives/caragor bait go a long way towards adding variety and keeping the crowds manageable.
-I have to say that researching weaknesses makes captain/warchief encounters laughably easy. This may be a consequence of the first area, but at least half the named orcs can be one-shot if you use the right attack, and the rest have weaknesses that don't really require much effort to exploit. The only orc I had issues with was one that (oddly) didn't appear in the army list at all, and was only featured in a red icon mission that gave a "special reward" (epic rune). His only weakness was to combat finishers, but used a shield, prevented vaulting over him, and was immune to stealth/ranged. This meant that he couldn't be attacked directly at all, and I could only damage him by building up a combo on minions and then executing him to chip away at his life. It took me three tries and felt like a pretty tense, engaging encounter--I'm hoping I can get more of that kind of experience in the second area.
-The story is pretty mediocre. The intro feels especially rushed, and not a lot of characterization for the Black Hand--I killed the first one without learning a single thing about him. It's slightly disappointing, but the authored narrative was never why I bought this game.
Overall I'm having a ton of fun with the game so far, and I hope unlocking the ability to mind control orcs in the second area will only deepen the emergent possibilities.