Interesting to see Jodi Magness is now arguing that the Galilean type synagogue was not developed until a couple of hundreds year later than most scholars had previously proposed:
Christian and Jewish scholars tend to like dates as early as possible, as that suggests greater historicity for the biblical narratives as well as the traditional accounts of Jewish and Christian origins. While the hermeneutic of suspicion (in this case, suspicion of self-serving early dates) cannot be invoked too readily, I find it intrinsically probable that the development was slower than the traditional stories want us to think.