I am not worried by this mothership. It was pumped up for the video. And it wasn't that overwhelming with backup in the last battle of the video. Though it didn't use any of it's abilities.
Are you talking about the dropships from the newer video? I think that base defense was just purposely set up to be lousy so they could show how the phase cannons work.
the carrier was kinda like an ultimate weapon in the last starcraft...tho admittedly emp and plague ruins them. i think the new tempest does not serve the feeling of a capital ship. they should dump the tempest and bring the carrier back.
When did a floating hollow blue pineapple ever feel like a capital ship...