I LOVE this post and have been thinking the same things for years. Most recent games are focusing on the wrong things in my opinion. Sure the flash gets the games off the shelves aka Skyrim but the AI stops people from playing them, aka Dragons in Skyrim
I truly hope this game gives us a legitimate challenge bordering on frustrating but makes it fun at the same time.
Best table top D&D session I ever played pushed the party to the limit but still let them win. Face it, none of us want save game spam fest, but we also dont want to roll over everything.
One of the big pieces of this is caster viability. How many spells did you use in the BG or ID games? Very few in my experience. I loaded my party up with bows and went out sniping.
This was fun at first but got a bit boring later on. I kept seeing all these fun spells in my spellbook that I had little to no use for.
This was due to lack luster AI and relative monster strength.
Kiting is a good example of exploiting the AI. There are several encounters in the above mentioned games where you could stand behind a tree and the AI couldn't path to you so the monster would just go left, then you move, monster goes right, you move. All the while your party is peppering the poor guy with arrows.
I am really also hoping for an "aggro" based combat model, so much so I think I will put up a poll about it.