I think it's needed, and if built right(another finger pointing to the importance of Japan in this endeavor) it will be a big help. Same with the high-speed connector between Angeles City and Manila. If done right, with proper tech, and again, run all the way to the Aquino Airport in Manila....a very good and highly needed thing.
I think the later could make Angeles City a big player in the Phils. The growth it could cause would have it growing and pushing Cebu City for who's more important/bigger to the Phils economy and all.
But, I am totally with you Samoa on how big of a waste it will all become of Filipino tech/construction/money management is what is used to build them. Every earth quake will have many on pins and needles.
On the flip side, if these are handled correctly...I could see down the road more elevated railways and subways coming to the Manila area and being built by international tech/construction firms/governments. I know this is a big thing on the items that Duterte wanted to improve. He gets these done...he'll be very popular among a lot in the Manila area.