SBS Transit OR SMRTB Peak hour
train duplicator Service 120 in attempt to improve
situation in train during morning peak from NSL towards JE,
then to city
http://singaporeseen.stomp.com.sg/singaporeseen/viewContent.jsp?id=67672
Situation as reflected in above article
Yew Tee Stn (revenue sv starts here)
CCK Nth Ave 6
CCK Way
Bukit batok Rd
BB West Ave 5
BB West Ave 2
Jurong East Ctrl
Boon Lay Way
Commonwealth Ave West
Clementi Rd
AYE
Telok Blangah Rd
Anson Rd
Robinson Rd
Stamford Rd
Penang Rd
Somerset Rd
Orchard Boulevard
(revenue sv ends at Orchard Stn)
If its a good suggestion to improve situation in morning peak
train as above in article, Ben please do your fantasy deployment
bus then decide SBST or SMRTB 
I think there should be some sort of peak hour bus services
similar to premium that serves express routes in between those HDB
estates with big populations like Jurong West, CCK and CBD.
The operating details is as follows:
Operating hours: Mon to Fri 0700-0900hrs (towards CBD)
Mon to Fri 1700-1930hrs (towards heartlands)
Fare: $S2 flat fare (Standing is allowed)
Frequencies: 15 minutes.
An example of such routes:
Service 390: Yew Tee to Shenton Way
CCK Nth 7, CCK Cres, CCK Nth 7, CCK Dr (Yew Tee MRT), CCK St 52,
CCK Nth 5, CCK Way, KJE (Express), PIE (Express), Clementi Ave 6
(Express), AYE (Express), Anson Rd, Robinson Rd and Fullerton
Rd
Collyer Quay, Shenton Way, AYE (Express), Clementi Ave 6 (Express),
PIE (Express), KJE (Express), CCK Way, CCK Nth 5, CCK St 52, CCK Cr
(Yew Tee MRT), CCK Nth 7, CCK Cres and CCK Nth 7.