simultaneous localiser and glideslope intercept is not a substandard service
As a matter of fact, it is. The standard (in the UK at least) is set down in MATS Part 1 -
"Except when Continuous Descent Approach (CDA) procedures are in operation or in an emergency, aircraft shall be positioned so as to maintain a period of stabilised level flight before commencing descent on the glide path, on descent profile of a pilot interpreted approach, or on the nominal descent path of a SRA."
Not to allow a period of stabilised level flight before commencing descent does not, therefore, meet the required (note the use of the word 'shall') standard and is, consequently, sub-standard.