I also have this question but need the time series to display each day rather than lumping them together by week. We're looking at several different time series data sets and some of them are not daily so we need to be able to have each individual data point on the chart.
Ditto to this question and DerekKonofalski's question. Need to be able to adjust the default Interval used on the TimeSeries. With cross-filtering on, errors are thrown on other charts when we select a datapoint on the time series.