Personally I like to give intention with the Downwind call only
Agreed - But, if at the end of a Circuit Detail you call "Downwind to Land" there is still a good chance that after you call "Final" the FISO will have forgotten and reply "Touch and Go at your discretion"
this, together with "Glide" or "Flapless"
Agree with letting people know you are going to do a Glide Approach but, with a Flapless Approach, there should be no (or only minimal) difference in your height or position in the Circuit as compared to a 'normal' Flapped Approach so what is the point?