For maps like the vanilla ones when there's enough ocean to place the USS Freedom & USS Liberty from the Jets DLC, I think it would be great to have a high quality vanilla remake of the A2/CUP LHD and an LPD with functional doors like the destroyer, so that way people have more options for mission design & deployment positions, versus just being on a different side of an island as the enemy. Also a vanilla option would help prevent clipping through the floor. It would be a good way to introduce the Marines into the A3 story and it wouldn't really need a campaign or any new assets to accompany it as it could be explained that all branches field MultiCam uniforms in this universe and the Marines use the vanilla HK416 while the army uses the vanilla ACR clone.
