In a way, Shanmugam is right in telling the Singaporeans to vote for the President as spelt out by the Constitution and not the President they wished to have. What else can the Singaporeans do? For this presidential election, Singaporeans have no choice. It is written in the Constitution and Singaporeans going to the polls cannot act other wise.
Singaporeans who want to vote for the Office of the President with powers and duties they wished the President would have would have to wait till the next GE. Only in a GE will Singaporeans have a choice to decide what kind of EP they want. And if they are serious of wanting their kind of President, they will need to vote in a different political party to Parliament and with a 2/3 majority. Only then can they change the terms of reference of the EP, even all the criteria of eligibility for the presidential candidates. They can even disband the Presidential Election Council.
Yes, they can do that only if a new party comes into power with a 2/3 majority in 2016. For the time being, everything is fixed. Cannot change except to elect one of the Tans. There is nothing else that Singaporeans can do now.