Don't extend this 2133 to Kerala. Instead, make 2519/ 2520 PUNE-ERS express a daily train with 6 slip coaches (4 SL, 1 3A and 1 GL) to Coimbatore. Why can't we think out of box? Only Kerala people (except Palakad) should get the benefit of Konkan railway?
This can pave way for plying trains to down south like Madurai and Rameshwaram, once the Palakad - Dindigul gauge conversion is over.