Wow, I must have some pretty decent clairvoyance myself, just the other day I was playing Singularity at work and thinking "I think Yahtzee will rip on this game in his next review. It has all of his favorite points to rip on. It's too easy, it has gimmicks, and it blatantly rips off at least 2 other good games, this sounds too perfect for him to just go into, state the obvious, point out the lack of making people into babies, reanimating the dead, the number of staircases and chalkboards that are all imbued with Mysterious element Egg (and why every soldier can be aged.. why are they all imbued with this element?!)
Despite all that, I'm really enjoying the game because it has proper pacing and storytelling. In the interest of keeping this short, I'll sum it all up.
Enemies: Good, varied, damned annoying.
Weapons: Varies from poor to amazing, but I like the selection.
Areas: Dark and creepy in the present, Bright and colorful in the past, whatever.
Story: Doesn't work in many ways, but that's just nitpicking.
Support Characters: Aren't babysitting missions waiting to happen. They take care of themselves! (mostly.)
Favorite point not mentioned: The first person view mini cut scenes, they were done very well.
Gameplay: Smooth, interesting, and not sure if it wants to be action or horror. The amount of crap on the ground is clearly pointing to action, but some of the enemies are trying so hard to be scary. The puzzles may get you at first, but after that they are all copy paste.
Sounds/Music: No complaints.
EDIT: If I could add anything into the game, I would add in the chance to get off the linear storyline path (in a Disgaea kind of way) and "finish" the game at chapter one because you chose not to help someone. And having alternate paths to follow if you allowed certain events in the past to happen. Plotholes are always going to abound when some "world domination time changing event" takes place, so why not just get crazy with it?