12629 takes 47 hrs from ypr to nzm , 14 to 15 hrs more than 12649 or rajdhani which take 32 33 hours. Idle rake, yes I feel this train shud be extended to cdg as 22685 is a very lengthy route. 5 hours each way plus 10 hours for maintenance.
12629 runs via ubl bgm mrj pune. The route from pune to nzm via dd mmr doesnt pass thru any station in karnataka. Pune dd mmr all are in maharashtra. So north karnataka doesn't lose anything.
And no...
more... point linking ubl to nzm going back to gdg bgk sur then pune. Wont help hubli pax . Rather both these trains can meet at pune jn, proceed via bsr , brc to nzm.