The fact that major updates have always removed RSAT doesn't make it acceptable, nor it is acceptable for the RSAT installation to simply close in a couple of seconds without doing anything if a required language pack isn't installed. To not even show an error is unforgivable.
RSAT should be updated as part of the Anniversary Update, and the RSAT installation should at the very least warn you that a required language pack is missing, and maybe even give you the option of installing it. Doesn't seem much to ask, does it?
