Didn't a ident squawk used to be necessary to trigger the Code/Callsign conversion?... therefore an automatic ident by the pilot "may" help in this respect if the software still needs it)... but as the similar,current thread points out with some systems it might be problematic... Best to do what you're told, otherwise it might lead to a misident... or more probably uncertainty... which is then time wasting as the whole process needs to be repeated.
A common problem seems to be pilots shortcutting a system, without consultation, because they are always asked the same thing, so think it will speed things up... afraid it doesn't necessarily stop Controllers from having to act/ask a question/ make the same statement... and it disrupts a standard practice, which is often how mistakes are made (on the ground and in the cockpit). If a shortcut can be made, go through proper procedure and get the SOP changed... otherwise leave it alone and do as you're told