Otherwise, what Burr said. The intent is not to list three things the speaker likes, but contrast the preferences of two different people. As noted, the comma is only there to avoid the need to say, "like" twice. The second clause is certainly dependent on the first, but saying "Suppose I like owlbears, you, hobgoblins" raises the ambiguity I referenced (though, of course, the proper way to do that would be "... you and hobgoblins" ) hence the semicolon.

But the intent of eliminating a word was to make things LESS cumbersome, and I think that goal was achieved.