I'm kind of wondering how smart can a bass line be, if it doesn't know what the next chord is until you play it?

A 'walking' bass-line walks FROM somewhere, TO somewhere. It always knows where it is FROM, but it sure don't know where it's going TO!

Mind you, I have always thought that, in an arranger with a Chord Sequencer, once you have played the chords one time (and had the usual 'lost' basslines) the arranger might be smart enough to analyze the chords and drop in basslines that actually DO move intelligently from one chord to the next...

Oh well... Next year in Jerusalem!
An arranger is just a tool. What matters is what you build with it..!