1v1 Season 4 map pool did change !

From Blizzard

After reviewing player feedback, we’ve selected a 1v1 map pool composed of tournament-configured maps for the upcoming Season 4 of the StarCraft II ladder.

Six of the eight total maps in the Season 4 1v1 map pool will be maps that have been used in tournaments around the world. In addition, Shattered Temple and Metalopolis will be returning to the map pool, with close spawn positions disabled. Two non-tournament maps -- Abyssal

Caverns and Nerazim Crypt -- will also be included. Players can veto these two non-tournament maps and still have a single veto remaining for the remaining maps, just as a player would in a major tournament.

These maps will be removed:

(Wiki2)Backwater Gulch
(Wiki2)Searing Crater
(Wiki2)Typhon Peaks

These maps will form the new 1v1 map pool:

(Wiki2)Abyssal Caverns (non-tournament)
(Wiki2)Antiga Shipyard
(Wiki2)Metalopolis (close spawns disabled)
(Wiki2)Nerazim Crypt (non-tournament)
(Wiki2)Shakuras Plateau
(Wiki2)Shattered Temple (close spawns disabled)
(Wiki2)Tal’darim Altar LE
(Wiki2)Xel’naga Caverns

Depending on the feedback we receive regarding this approach to the 1v1 ladder map pool, we may move further toward a tournament-configured map format in future ladder seasons. We look forward to hearing what you think, and we hope you all have a great Season 4!

I love the new map changes! bringing back metalopolis is one of the best decisions!
however I'm kinda sad Backwater Gulch is now gone I actually liked that map and did pretty well on it for the most part...