As all trains TT getting realigned, for TN, KA & KL, I suggest following changes:

MYS SUR Golgumbaz as SBC SUR.
MYS SUR Basava reroute via GTL, BAY, GDG, BJP
MYS NZM SJ...
more...

reroute via HAS, CTA, BAY, GTL, RC, KCG.
SBC BIDR run as MYS BIDR via SBC, GTL, KLBG
SBC CAN reroute all days via MYS
SBC KIK passenger convert as express and run as ONT Via KPD, TNM, VM, MV.
YPR NZM via KCG as MYS NZM
YPR NZM via UBL reroute via GTL, BAY, GDG, BJP
MAQ KCG reroute via HAS, CTA, BAY, RC, MBNR.
MAQ MS reroute via HAS, BAW, KJM
MAQ SVDK reroute via Konkan, BRC
CAPE SVDK reroute via Konkan, Bhopal
TEN SVDK remove complex link and run as independent train via MDU, TPJ, MS
GUV MS reroute via TCR, PGT, DG, TPJ, MV.
QLN MS Anantapuri as TVC MS via QLN, TSI, MDU, TPJ Chord line.
TCN PGT Passenger convert as express and run upto Guruvayur.

Make both Chalukya twins run in their shorter route (not via YPR, and troubling long distance passengers wait for hours at YPR) and in that slot, run proper SBC Mumbai SF.

Hope atleast some of these things happen. Request more views/ suggestions.