This presentation was tailor made for me.
That's an understatement. If I didn't know better, I'd say you created the presentation!
Only thing I disagree with is the "all crossings signal-controlled" bit. Typical B4's, with merges or yields for the off-ramp, require drivers to give way to pedestrians. The signalised variation (without free-flow ramps) is less common, and usually more expensive to build since cloverleafs are more easily modified into the traditional free-flow design (and are often the reason the B4 exists -- prior cloverleafs).
Here in Tacoma, our B4 (former cloverleaf) operates without pedestrian crossings. A separate bridge was constructed for pedestrian crossings. But, if crosswalks were added today, this is how it would work out for pedestrians:

FWIW, this is by far the best interchange in the city. I have never been stuck in traffic on it -- ever. Can't say that for any other interchange.