I rode this last week, and it's great! I did have a very hard time turning left from Fruitvale onto E 7th (to head toward Embarcadero) though. From the plans looks like no x-walk going in there?

Very cool topic! I'd add Alameda Creek Trail & Coyote Hills Regional Park, reachable from Union City BART.

I grew up in NJ, and this was my local traffic circle. Even ECR or Stevens Crk are super walkable compared to this. It even features a diner (excellent, by the way) that's on an actual highway on-ramp.

Remarkably pure example of the No True Scotsman fallacy.