It's probably a way for them to build a bus loop at Seton station to have capacity for feeders. A two lane road paved on top of the alignment won't be too wasteful especially if they design the utilities to be converted
In terms of connectivity it's obviously important, just that what's actually there is a gigantic loud dirty canyon with dangerous intersections that have killed multiple people
I'm looking forward to the conversion, if they do it well and it ends up like the renders I'm gonna prefer it over the original especially the ground level.
Stephen Avenue is supposed to have soil cells, maybe also water tapped off from the pipes underground as well but I'm not sure if that's made it past the concept plan
I don't think they're bad, just that they're too far away and made to serve a massive area. QP is more accessible and a nicer size for an urban neighborhood
Btw the new Centre Street MAX stations have blue plastic TWSIs set into the concrete and they're much much better done and have blank decision points and visually pop from the concrete much better.
I'm not sure if they actually left the sand there. They were filled right to the top of the sidewalk level and the slabs are at least a few inches thick