The problem with the serialized series is that many arcs simply do not contain enough plot to be sustained over 10-13 shows. Often by the end of the series, one is feeling that the ending is long overdue - and I've often stopped watching these series at show five or six simply because their plot pacing was so glacial.
If Netflix wants to really produce great programs, they also need to drop the standard 10 or 13 program package. Sometimes a story does take a long time to tell. Other times it's just filling out contractual obligations.