My opinion; it’s a waste of time.
When I hear “request”, I’m reaching for pen and paper to be ready do jot down a possibly complex request…
Anything routine, level change, directs, vectors around weather etc, just say it. Two transmission where one can suffice is a waste of your time and mine.
If I don’t have time I’ll just say “standby”, and please, please, please don’t acknowledge that with “standing by”…