Reading this particular thread, I had to smile, because I was reminded very strongly of another finesse pitcher of several decades back. Eddie Lopat was a prime example---not much on speed (or so he wanted batters to think) but the owner of a whole closetful of offspeed and breaking pitches---at least 24 of them, although I think it was much more than that. Lopat was a master of deception, misdirection, and misleading batters into thinking he was going to throw one pitch and then coming in there with another one, which he did all the time! Gee whiz, he even threw a pretty good knuckleball now and then.
And he once said that every pitcher has a favorite patsy. The Cleveland Indians, who at that time were a very good team, were his, and from the time he came up to the American League in 1944 he zeroed in on the Tribe. In no time at all he became the one pitcher they feared more than anyone else in the league. He ended up with a 40-13 lifetime record against them.
I know all this, because for almost four years---starting in 1951, when I asked him something about the slider and his response was to take me aside and show me how to throw a good one---he was my de facto pitching coach, and what I learned from him was nothing short of priceless. And so I'm saying that Greg Maddux was a very similar type of pitcher.