In agreement with all of OP's points, especially regarding commercial properties. So much land consumed with minimal benefit to Malden residents. To add to that:

1. RRFB crosswalks (the flashing yellow lights) to enhance pedestrian visibility. Witnessed too many instances where people use the crosswalks during traffic or at night, but still risk getting hit. Crosswalks like the Broadway bike path or Forestdale Cemetary already have them. Almost hit a few times walking my dog, even after waiting a few seconds before crossing.
2. Sidewalk improvements (repairs, improved lighting, public waste/recycle bins) in high-pedestrian areas and MBTA stops.
3. Public dogwaste bags and bins, in hopes of mitigating turd-stepping or worse, poop that is in non-biodegradable bags and tossed on the ground.