Wasn't it Shizuoka who made those complaints and wasn't it because they don't stop in Shizuoka?
Or, given the scale of that proposal, would it actuaaly be cheaper to use a tunnel boring machine to bore a tunnels at big depth all the way from Omiya to Shin Yokohama with a stop at Shinjuku, and then add a connection line between Nagano Shinkansen and Tohoku Shinkansen near Omiya station?
This would also help connect all four lines, save abput half hour journey time on any traffic from Tokaido Shinkansen to Joetsu/Hokuriku/Tohoku Shinkansen or vice versa and alleviate capacity bottleneck south of Omiya, and save time for people travellin
The connection line north of Omiya can connect Tohoku Shinkansen from/to Hokuriku/Joetsu Shinkansen, however it won't save much time other than the transfer time for travel in such direction
South end of the line can extend toward Yokohama city center, and in total the line can offer long desired Shinkansen access right at the center of Yokohama as well as at Shinjuku station. However it won't be able to offer connection among towns in the alternative plan being drawn
It also will not be able to offer convenient transfer to Linear Chuo Shinkansen.
So the problem is, which od the two plans would be cheaper and have a higher B/C ratio?