I disagree, Both the services are biweekly and run in huge WL's and secondly From Mumbai there is no dedicated premium train,
So maybe a Raj if introduced from Pune via KYN,ST,BRC,KOTA (shorter route) or longer route from Pune via MMR,BSL,BPL,JHS (serving people of Maharashtra) would also work out well...
Of course this is purely my opinion, but i'm sure it will work out well...