Close first expo, but it's a choke and very open with two path, required to destroy the door to open the up the defend area. These zones are completely split into two part.
Tavern are close to main and hard expo. Which doesn't really benefit anyone, with the split part the attacker has to decide between tavern/main or harass expo.
Mid aren't hard and very rewarding for anyone who get take control of merc camp.
Red expo was design to be like far away from everything but still very safe/reward.
Mid is pretty heavily design for merc & market contest. [expo were base from "Hill of Glory"//
Mid control & city theme from "Veilstrom City" //
Lastly, hard expo that far apart from everything and high tier charge5+ item which come from old blizzard map such as "Plunder isles" & "Melting Valley" ]