There is no need of additional lines between VSKP & DVD. Already Automatic signalling provided between GPT - VSKP. 6-7 trains can travel simultaneously in each direction of existing double line. The bottle neck is availability of platform. If they keep on adding platforms will create more problems like Howrah (Lot of time will be wasted due to cross movements). The only solution is to lay new lines like bulb and eliminate engine reversal.
Similarly Railways can provide Automatic signalling between DVD-GPT and PDT-GPT. this is very cost effective solution compared to new line.