MAP Format serves only for the transfer of the level geometry. Wed loads basically no Entities from the MAP files. Reason for that: The Quake-Map defined multiple different classes for the Entities, but the classes Are not known in the WED.

Only level geometrie and Objects like "info_player_start" and "light" are imported and exports. All other Entities are exported as common Objects.

Since the version 6.7 WED has a Plugin interface