Not being harsh, I just think there are plenty of sculpts that come closer to replicating the person they're supposed to be.
Off the top of my head:
HT Marcus Wright
HT Blade
HT BR and DX Jokers
HT Mech Test Tony Stark
HT T-800
HT Dutch
HT Godfather
Enterbay Bruce Lee
Enterbay Jack Bauer
Sideshow Old Ben Kenobi
Sideshow Lando Calrissian
Every one of those sculpts, to me, clearly looks like who it's supposed to be and to find flaws would require careful photo study and comparison. To me, the HT Connor sculpt is lacking the defining nose, lip and cheek look of Christian Bale. It pretty well captures him, but compared to other heads, I can instantly see something off with his portrait where the others I've listed, I'd need to compare to photos to find something off. Bale's probably a challenge, between Bruce Wayne heads and Connors and some Equillibrium sculpts, he's been done numerous times and of all the heads I've seen, only 2 really capture him well enough to recognize the sculpt as Bale.