It's really hard to know what to do with a Church that is divided about evenly. This isn't the first time. There have been several past divisions, the Old Side / New Side, slavery, the conservative / liberal issues in the early 20th Cent, and now this.
Historically, we've chosen to make statements in the Confessions, and then allow ordaining bodies to apply them to individual candidates. Since the original adopting act in 1729, Sessions have had to judge how serious they think departures are.
The insertion of G-6.0106b was actually a departure from tradition. 54% didn't want to allow Sessions the ability to judge whether certain departures were essential tenets of the Reformed Faith, because they disagreed with how certain Sessions would decide.
The change actually didn't work that well: In 2008 the GA issued an Authoritative Interpretation saying that since no one had bothered to remove G-6.0108, in fact ordaining bodies could still decide whether or not to accept a given departure. Hence G-6.0106b has been inoperative for its original purpose for 3 years.
If you think sexual purity, and specifically homosexuality, should be treated differently from anything else, you'll obviously not like the recent action. Given that purity wasn't high on Jesus' priority list, that seems like an odd decision to me. But there are certainly people who feel that way. But the current approach is really consistent with how we've often tried to handle things in the past. Now past efforts haven't always worked. We split, to one extent or another, based on all of the issues I listed above. But it's not an unreasonable attempt to make, given the way the Presbyterian Church has worked historically.
Remember that we've never been quite as centralized as the Catholic Church. We have confessions, but every court of the Church, including Sessions, is expected to do theology, and they are permitted to interpret Scripture for themselves. Of course they're supposed to work within the common tradition, and higher bodies can do something if they depart too seriously. That's our attempt to find a middle ground between congregationalism and the Catholic Church. Generally I think it works fairly well. However in this case the "common" tradition is itself split. In theory that's not supposed to happen. A confessional church depends upon a common confessional tradition. But if we're going to coexist, we're going to have individuals and groups aligning either with one of the other variant.