My personal opinion wrt to the city of Bangalore has been that authorities & public only seem to wake up when the situation becomes really bad. They should have thought of the same much ahead. It is impossible to think of adding an existing line for suburban services in the already congested SBC-Whitefield stretch. Also YPR-Hosur line doubling is also very difficult as one can see lots of residential apartments in close proximity to the tracks. Not sure how all of these can be solved . In the current scenario this seems to be a tough ask.
But lets hope for the best !