And the disappointing reply i got:
Madgaon station is second coaching terminal within Goa and situated at 28 Kms from Vasco. Due to limited terminal facilities at Vasco, it is not possible to change the terminal from Madgaon to Vasco. Due to ghat section constraints between Castle Rock and Kulem stations on Vasco-Londa section, it is not feasible to introduce additional trains via Londa. However, Connectivity is available between Vasco and Kacheguda through slip coaches by Train No.18047/18048 Howrah-Vasco-Howrah 4 days a week express. Proposal has been sent to Railway Board for increase in frequency of Train No.18047/18048 Howrah-Vasco-Howrah 4 days a week express to daily