I think pentagram is reaching too much.
Clearly there are 4 key areas along the coast, plus the central peak. That fifth area has a small outbuilding but it is not significant in the overall scheme.
NESW is interesting in the context of Q drop #1001 >>885319 -- and also given the compass at the north point of the island. But the four points don't match cardinal directions. I think it would need to be exact if it was supposed to have significance.
Cross is best explanation I have heard.