Use simple edit box for the Value option in Simple Date Filter dialog instead of the Date Time Picker. (Can set @DP = 1 if you prefer to use the picker control.)

Use the 1st non-missing value instead of current time as the initial value for the Value edit box in Simple Date Filter dialog.

For Date value with time info but display only with date part, improve the equal condition handling to only compare the date part.

Use simple text for the Filter label. For example, >=14 or <30

When use Simple Date Filter, the date value shows in Filter label string will follow the column display always.