Havent looked at that rotation in a long time. All the maps in it were newly compatible maps that nobody put into their rotations. So they are there for people to play and after some gametype decide which ones they like and which ones they dont. Then tell people. The ones that people like, filter them into rotations.
Bestine is a cool Star Wars map. However it was probably one I just made sure it loaded correctly without failing due to asset limits. Shame because its well done.
The isla map, no its not a zombie map. Otherwise yea if you jump in the water you are out. One side is on the ship, which can be turned on to go to the island, the other is inside the missile complex. There are 2 or 3 big lifts to take you up and down. However it might be more of an objective S&D style map. Attackers on the ship, defenders in the silo.
In any case, I recommend after those two are taken out to play the other maps and give them a chance. See if there are any you like to add to the rotations.