I honestly have no idea why they don't maintain the existing cycle track.
Why is there no need for cycle tracks on both sides? That's like advocating for one way sidewalks.
No it's not... no comparison there. The existing cycle track is two-way. Bike is MUCH faster than feet. There's no need for two way cycle tracks on both sides of any street. Not that it's necessarily a bad thing, but completely unnecessary. Certainly not needed here and not worth whatever cost of construction is.
Melnea ALREADY HAS coordinated signals but congestion at either end (the connector and Tremont St) causes them to be much less useful. In the morning you could theoretically travel from the connector to Tremont at 25mph and not get one red light. In the evening it switches to favor the other direction.
I drive on Melnea Cass all the time, including without traffic and driving the speed limit, and these lights are DEFINITELY not coordinated.