This is a bit cryptic I think. On the one hand you say that Series and Index share common operators, but then you say weekday is removed and datetimeindex methods on a series will raise (so this is not sharing).

Are the changes that are relevant to users not:
- Series.weekday is removed (and actually should first be deprecated?)
- min/max/unique/nunique/value_counts methods are added to Index types (that they are shared with Series is an implementation detail, no?)