I'm this pushing out, but these people who made lost may have a tendency to repeat their themes.
I'm considering that all the people in the town are actually deceased, everyone of them entered this town from different locations in the USA.
I'm on episode 4 now and picked together a few things, the crows in various fictional stories and myth are often related to carriers and transporters of souls, the treen in the road is the end of a long journey, Symbolic of an end of life met with a sudden tragic end.
Each of the people in the town died tragically in a collision on the road, sudden death and they are wandering between the land of the living and dead.
In lost we found out everyone was dead, this theme seems to mirror in From, the creatures are the representation of finality. Roaming monsters the great devourer of life, they literally are death embodied, slowly stalking waiting for the final invitation.
Death can be swift but for some it's like torture as the soul tries to hold on to a broken body.
They consume almost everything leaving only the head the last sight of a tortured soul in final death.
The trees that transport objects to random locations are mountain ash symbols of protection against malicious evil, unlike the sycamore the ash is a block a lock against evil, whereas the sycamore is a portal that has definite point to point entry and exit.
The portals known as faraway trees are the idea of elusiveness and escape, it is in its self an illusion since the portals never allow you to leave the town but only place you randomly else where within the nexus of the trap, death is inescapable.