It’s a cool design. What I find interesting is there are versions of the Ralph McQuarrie paintings featuring what eventually became the Tantive, but the portfolio released after the film only features the Falcon we know.
Was Lucas quietly revising the history of the film even then?
Hindsight being 20/20, I think they worried too much about a resemblance to Space 1999’s Eagle transporter, as that is at least a kissing cousin of the Moonbus in 2001.