Hadn't seen this before, thanks for posting it.
So the plan at one point was to park a full scale Milano on top of a more sculpted building. In that case, they didn't scale down the ship so much as they changed to a different ship still seemingly at full scale:
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This is a Starblaster:
Star Blasters were a class of ships used by the Nova Corps. The Nova Corps used the Star Blasters' tractor beams to subdue Rocket, Groot and Gamora after their fight on Xandar.[1] During the Battle of Xandar, Garthan Saal led a fleet of Star Blasters to defend Xandar from Ronan the Accuser's...
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I'm a fan of going with this ship as its shape really works as an eye catching icon. The pavilion looks closer to something from Xandar, but I'm also fine with they look we're getting. I am curious about those objects to the left in your pic- simple decorations or something more?