Have a look at Wander's expressions in the original, compared to the emotionless doll he is in the remaster. It's just one tiny thing, but takes away a lot. In the original, he was panicked and under constant stress and strain. Understandable, considering that he's battling giant monsters. In the remaster it's just another day on the job.
The one thing that the remaster can never replicate is the mystery that the original had. People spent years going through every nook and cranny. Digging up unused areas, beta Colossi, and special weapons and items. No other game in history had what the original Colossus had.
I played all versions and love the remake. Yes the original was more dreamy due to the 'fog' hiding the low draw distance and felt more dramatic due to the low resolution, low frame rate and lots of judder. It's a curse with remakes. Your mind has filled in all the gaps between the key frames with your own interpretation of the characters and world. Hence darker games always seem to look better since your mind completes the scene.
It's the same with movies. Watching the dark crystal on blu-ray makes it all look rather fake and emotionless. You can even see the strings attached to the puppets. Same with the Neverending story. On VHS, amazing, on blu-ray, looks too fake. Willow was also disappointing on blu-ray.
However the landscape and colossi look amazing.
But true, his facial expression is pretty much 'all in a day's work'
It's still better than BC mode where you get sharp lines and edges with blurry textures. The ps3 remaster is my least favorite now and I hope Ico gets a remake as well. The stark contrast between low res background and sharply defined foreground with low res assets breaks the immersion for me. I still cried at the ending lol, the music was left untouched :)