The SoD expansion was made by Beamdog some 15 years after BG1 was released. It's admirable that they tried getting the original voice actors back, but otherwise the team behind BG 1&2 (and ToB) had nothing to do with it. I couldn't get through it, and I have a hard time supporting the Enhanced Editions as is due to Beamdog inserting their fanfiction into them as well - though I recognise they've been instrumental in revamping the engine and bringing the games to a new generation of people.