I've definitely considered that Blackwall could be an option because it's a bit shocking that they only planned 2 options for gay males and still planned to lock one, but I'm leaning towards thinking they were just willing to do that at one point now. 
The issue is confusing. They said everyone would get two choice, but it was after Iron Bull was ungated. David Gaider said they used the chart to make sure everyone got two choices (he used gay, male dwarves as the example) but I know at the time there was also a quote going around from Allan than said he "didn't think" it was always the case that all race combos would get two options, but that changed. Or, at least that was how people were taking his comment. It was quoted more than once in the old romance thread and the Solas thread, so maybe I can dig it up again. I know people generally don't like taking hearsay about quotes, which is understandable.