For what it’s worth, I’m going through the same decision making process for a October trip and think I’m going to do Astir Palace (if it ever opens; seems like it was supposed to be open a while ago...). But we did Athens (city proper) not too long ago. Feel like I might regret it if we get terrible weather in Mid October and end up wanting to go into the city to have something to do because the beach pool is too cold to even sit at (we’re generally happy to do that without swimming) but we’ll see.