It seems to me that all original Beamdog content uses "SCS-lite" scripts for its enemies. This is most obvious in Siege of Dragonspear, hovewer any new content in BG:EE and BG2:EE - mostly the personal quest stuff for Neera, Rasaad and Dorn - will also utilize it.
Not only that, but if the creatures used in those encounters(or SoD) also spawn elsewhere, they will inherit this "smart" behaviour.
To those unsure what am I talking about, let me give a few examples. In the initial fight with Ekandor in Beregost, the Thay Mage will try to move away from your characters when he's not casting spells. The Tasloi, even ones randomly spawning in the game, will now try to use the superior reach of their spears when fighting. Bandits, also randomly spawned, will wander around even when out of sight, and when you attack one of them, others in vicinity will come running. I was running through the Mutamin's Garden the other day with Protection from Petrification on and after one round of fruitlessly trying to petrify my character, the Basilisks and Greater Basilisks moved into melee, "realizing" that their gaze is not working.
None of this is vanilla behaviour. But that isn't the problem. These kinds of AI improvements are really more of a "common sense" change and welcome, at least in my opinion. As long as Beamdog sticks to AI improvements, and not for example giving every NPC a small fortune worth of potions(*coughSCScough*) I'm cool with it.
The problem here is that this creates a seriously uneven gameplay throuought the saga. You start in Baldur's Gate, where most AI is "dumb", except for some beforementioned creatures and EE NPC quest encounters. Then you move on to Siege of Dragonspear, where all
encounters use the "SCS-lite" scripts. Once you get used to the new, "smart" AI in SoD... you are kicked back to "dumb" AI in BG2:EE, again - except for some specific creatures and EE NPC specific encounters. Then finally you move on the ToB, where AI isn't exactly smart, it just doesn't matter because everything is a Mage with Time Stop.
So the question is - what should be done about it? Should Beamdog improve the AI in BG:EE and BG2:EE across the board, up to SoD's level, for the sake of consistency?