As far as the larger question of, do we need a survey on these topics, I'm wondering what our end goal is as a group. I know that this is a short-term committee and that we need to assemble a report (this summer, I think?).
If we think that we want to propose to SIGCSE that there is demand for a standing group, seeing the amount of information that people want about how liberal arts CS education is being structured and that we don't have could be a compelling part of the argument. Additionally, we don't currently have a good place to house any information we gather - hopefully becoming a more long-term group could justify establishing a home for this sort of content.
If we do want to gather more survey data, I might be inclined to assemble more of a meta-survey to build on what we learned at SIGCSE and find out from a larger set of those involved in CS education if we've correctly identified the major issues and concerns faculty at liberal arts institutions have or not. We could likely assemble the survey from the summary document we already have.