We usually visit in January because of the lower (not low) crowds. We find G+ useful for MK and DHS, especially because we tend to enter the parks late in the afternoon and can stack G+LLs with that in mind. We also buy IL$ for the rides that are important to us, such as FoP in AK. For GotG, we got a VQ but also bought IL$ for it, so we could ride more than once the same day. Tron wasn't open for our last visit, but I expect to do the VQ/IL$ combination for it when we do get there in January (assuming it's still VQ).
IOW, it does depend on what you want to ride and how long you're willing to wait in line for those rides.