Having had a front-row seat right here to the whole debacle, I think it may have been avoided entirely if the first leaked image was
the three-quarters view seen inside the issue of TV Guide previewing the series, rather than the top-down view that was put ont he cover. The fact that the dorsal view was also a low-res thumbnail (even for the time) played up the similarities in the gross shape and hid practically all of the differences aside from the nacelles (come to think of it, I'm not sure we'd even had official orthos of the Akira at that point, so even the most sharp-eyed shipwatchers wouldn't be able to see the proportional difference at a glance).
But, the first thing we saw was the view that looks most like the Akira, at a size that hid all it's distinguishing characteristics. I remember my own reaction was, "What the hell, is that just an Akira with TOS nacelles?" followed by, when I saw the second picture a few days later, "Oh, I guess not. It's actually quite distinct." I think some people just never got past the first impression.