Might have to go look at the full report when I have time.
I do like that RTC is looking at some options for Boulder Highway. IIRC, that road had the highest vehicle-pedestrian crash rate (or fatality rate) in the state a few years ago, if not still. Having a frontage/access roadway separate from through traffic might be good in the long term. Boulder Highway is one of the roads where RTC runs express buses (I think it was the second or third express bus line they implemented), so bus lanes won't hurt.
With that said, I'm somewhat with skluth on the center-running bus lanes. They somewhat make sense when you're running only express buses, but I don't know that they are more accessible to pedestrians. You can have even more heat island effect waiting for a bus in summertime because the bus stop shelters will be completely surrounded by pavement, and in some cases they may be closer to passing cars even with protection.
I also don't think a green linear park would actually get constructed now. Given the recent tightening on water usage due to the prolonged drought (Vegas area has recently limited size of backyard pools, restricted new water features at businesses/casinos, and further limiting and/or restricting grass in residential backyards [turf in front yards has been prohibited in new home construction for about a decade now]), it seems unlikely that this would be approved. A greenbelt here would not provide any real recreational utility or any kind of tangible benefit other than "looking nice", which won't be worth the water usage.