I hope LTA will conduct an inquiry on this incident and proper
measures to be done. Hope this would cause SMRT's net profit to
fall for the next FY 
In every train disruption except Exercise NorthStar V, SBST
plucks buses from perm fleet and deploy them on the MRT Shuttle.
There was once a train disruption between Outram Park and Dhoby
Ghaut once (or many times already), SBST plucked buses from NBR
services to run on the shuttles just in case you dont know.
Why S15 and S12 have the longest queues is because S15 goes to
Tampines and Eunos while S12 goes to Simei and Tanah Merah. the
SBST RMs have no choice but to do all these. They are already
trying their best. Be fortunate that they helped out SMRT otherwise
things would get a million times worse that morning.
The one thing i like about SBST is that they are able to pluck out
buses from perm fleet and alter frequency by 1-2min and the loads
wouldnt differ that greatly. SMRTB... no comments 
Wonder if you know this... SBST have hgdep drivers trained for
MRT Shuttle should they encounter a train disruption in the NE
sector.. but to date... seems like most of the disruptions is the
HarbourFront - Little India sector 
They plucked buses from perm services to run on the MRT shuttle.
They used zero DDs because the DDs are able to cope/tahan the loads
on the perm service.
When tomorrow never comes........