Just finished Q Who in my linear watch-through and the compositing of the Borg cube really does look pretty bad. Very flat and gray looking.
Agreed. It looks more like a bunch of plastic sprues than it did when it was
a bunch of plastic sprues.
Yeah that was my concern about this ep from the very beginning-- that the Borg ship wouldn't hold up well at all in HD.
At the very least, it probably could have benefited from the more shadowy lighting CBS-D gave all the ships in S1, to hide some of the flaws and give it a bit more mystery.