Game is running at mostly Ultra settings. Frame rates are pretty smooth except on the campaign map and when I am looking down directly on a massive melee battle. On a Q6600/250GTS/4gb/Win7 system. Campaign map choppiness is intermittent, no idea why.
Battle AI is actually competent on normal difficulty. None of the stupidity from Empire has become evident as of yet. AI seems aggressive too and actually has a sense of terrain enough to grab high-ground advantages and to hide units. I lost one battle because I sent some samurai to kill their archers, only to get ambushed by some sneaky enemy samurai. Another battle the AI flanked around my approaching army and took control of a hill, pretty sure they got some sort of charge bonus for charging down-slope because they pretty well smashed my troops I sent up there.
No clue on naval battles. I built a few ships but have yet to test them out. I'm hoping its simpler than Empire, because as awesome as Empires naval battles were to watch, I absolutely sucked at controlling the ships and would litterally lose at 5-1 odds in my favor.
Campaign AI seems intelligent so far, and pleasantly both aggressive and reactive. Playing as the Date clan I was at war with a clan to the north, and friendly with a clan to the West. I attacked the northern clan after defeating an invasion force and lost, narrowly. I pulled my troops back to regroup when my friendly wetern neighbors seemed to capitalize on this and take out the northern clan.
After that the friendly clan became unfriendly and our trade agreement was cancelled. Fine. I married off one of my daughters to him and he was happy again. I assume the souring of the relationship was because A. They were stronger than me B. Shared borders and C. I had a large army at that border.
I then got a quest to take over some small island, since I was blocked from the rest of the mainland by my eastern neighbo I made a small fleet and took my whole army to go conquer it. Too bad I was too eager to actually read stuff on the screen, as that island happened to belong to my friendly neighbor. Woops. Taking the island was pretty rough too, and I had the disadvantage of having all my troops and generals on some faraway island. I got back JUST in time to reinforce my capital resulting in a large seige battle.
My city defenses were paltry, I just had a couple archer units and a samurai group along with whatever levies were raised. I DID have a large (although weakened from the island battle) reinforcement army.
I was suprised when the battle started to see the AI attacking the city walls from every possible angle. Needless to say my defenders were overwhelmed. I moved my reinforcements slowly uphill towards the city, and had to use my 4 general units to sprint ahead and kill some archers. Ended up losing 2 of the 4 generals, but it drew enough of the AI units outside of my own walls where I could kill them with the rest of my army. After that I mopped up the rest of the enemy with relative ease.
I love the utility of generals now, and how you can level them up and choose their retinue and assign skill points. I have a few questions (like does stacking generals in an army stack their effects?).
I've only spend about 2-3 hours with the game, and so far I am quite happy. Won't touch multiplayer until maybe this weekend