Immortal
Arcane
The spiders in IE games would throw web at you, stuck your party to the ground and go directly to your casters
Not without a mod they didn't.
Actually they did without a mod.. Maybe "going for your casters" is a stretch.. but sword spiders / the blink spiders would target range occasionally, not because they were range but because when they blinked / haste ran for your group they would just happened to end up next to that character.
Again though, when did BG 1 come out? What game pre-dated BG1 where they could "learn from those mistakes".. Sawyer has gone on record saying the AI in BG 2 / IWD 2 is superior / more sophisticated then PoE's because of a lack of time to build it out.