The default offset range makes categories bleed together

[joelostblom]

By default when creating a chart with jittered/offset points, they are so close together that it is difficult to see which belongs to which category (unless using color as in this example):

Open the Chart in the Vega Editor

Looking at the Vega spec, it seems like the offset by default is spread over the entire bandwidth:

    {
      "name": "yOffset",
      "type": "linear",
      "domain": {"data": "source_0", "field": "random"},
      "range": [0, {"signal": "bandwidth('y')"}],
      "zero": false
    },

I think the chart becomes significantly easier to read once scaling the range so that the max is bandwidth('y') * 0.7 (or similar):

Open the Chart in the Vega Editor

@kanitw Is this a case where the default would be easy to change only for quantitative fields without affecting how offset is handled for categorical fields?