Yeah not surprising to me either. After all he's the only one on that list who ain't an Origin companion so the list was never fair to begin with. If he wasn't on the list then Wyll naturally ends up being the least liked.
The only reason I don't like Halsin as a companion is because in terms of actual content he just barely exists and thus doesn't deserve to be one. In the end he's a casualty of a quantity over quality issue, which was funnily enough even a discussion here on the forums ages ago before the game released. In the end the saying became true.
