For this election, LHL did more than that to GCT.
In redrawing the boundaries, he put all the shit and crap from other GRCs into Marine Parade. Good examples of this is the bar strip of Joo Chian (yes Joo Chiat SMC does not include Joo Chiat road !), the happening lower lorongs of Geylang (while all the licensed brothels are) and of course the Aljunied constituiencies that showed strong results for WP.
TPL and Nicole Seah will of course weigh GCT down further.
The firing of Lim Boon Heng and the retiring of all GCT era Ministers was the next step to weaken GCT further. Right now other than MBT, there is no one left who was a Minister in GCT's cabinent. With MBT having his hands full in Tampines, GCT can therefore exepct to fight this election ALONE.
I would dare say that with these "little actions" that LHL has taken against him, he will be lucky to get more than 60% of the vote.