As people said, it really depends on it's purpose. If Tempest is our base of operations, with troops, vehicles and equipment station there - then we'll certainly need a bigger ship. I personally prefer capital ship with small landing spacecraft, for the sake of variety and cinematic. If N7 guy shows up on his gunboat (I assume he's using some other ship, since his nav screen differs from first concept of navigation map) - s**t got real, if Tempest shows up - you'd better run.
On the other hand, where would colonists take such ship? Ark should very full with other more vital stuff.
No load screens (including elevators) would be great.
If they manage to make loading screens between floors on current gen with 8gb RAM I'll applaud them.