Liotta looked a little like Hunter, before all Liotta's bad plastic surgery - although Hunter was northern European whitebread all the way and Liotta is more mediterranean. Aside from that general physical resemblance there has never been any case made for casting Liotta as Pike, at all.
That's the only case that needs to be made. Bridge, ships, props...people; as we all know, only the surface attributes of things are important to making Star Trek be Star Trek.
What are you, shallow?
