Williamson County is working on a new version of its zoning regulations. A number of interesting documents are posted to the Planning Commission website which you can find here. Overall, the new proposal appears to improve upon the old by a large margin. No longer will the confusing issue of conditional use permits issued by the planning commission be present; instead, "special uses" will be considered by the Board of Zoning Appeals, where it should always have been. Instead of preliminary and final site plan review, only final review will be necessary. Once again, it is difficult to understand why preliminary site plan review is ever necessary.
Overall, the new proposed regulations appear to be a strong step in the right direction.