Seaside was one of the best maps in CSGO. It was in several operations and was enjoyed by a lot of people until it was removed. 

Seaside should be added back either in the next operation, or into the default map pool like cache was. Maps such as Overpass and Cobblestone were added and I am pretty sure that most people would like to see seaside make a return.

It was in three of the four operations, why should it not be added to the map pool?