Hi Scribe and glad to have someone new join in as it's always great to get new opinions thoughts and ideas.
As for the splitting the Party, I agree with the fact of dragging the party members manually to separate them and always thought that there has to be a better way, But IIRC this was the same way in BG 1 and 2 as well someone corrects me if I'm wrong on this.
B)This bugged me why does the whole party follow along with the one for which is sneaking. You would think that if your thief or ?? went into sneak the other party members wouldn't all have to tag along there has got to be a way to fix this.