I'd love to have the ability to customize what gets synced on startup (in addition to the existing option to customize how often it syncs). Specifically, I rarely update my contacts, so the time it spends trying to see if there are any changes is essentially wasted.
My assumption is that if I could disable Contacts from automatically syncing (but keep the sync button so I can manually sync when needed), then it would speed up syncing what I actually need to sync (SMS, Voicemails & Recents), as well as reduce the volume of data that the VC servers would have to process. (From what I recall, the premium version - which I gladly paid for! - helps pay for the fee that Google charges due to the large amount of data that VC accesses.)
Quick side question: any chance of being able to sync contact groups from Google? Or is VC limited to only the My Contacts group (with no hope of accessing the other groups)?