I would actually put Trolls and Forsaken at around the same number, both probably outnumbering Blood Elves by thin margins. I also said most of this was speculation and guesswork - so it's entirely possible that I'm wrong, that you're wrong, or that we're both wrong.
Yes, but the point was that there were other boats - and that Gallywix's steamer was not the only means off of Kezan.