i’m just a regular user of the system, not staff. so i don’t really have insight into what staff would be willing to change. personally, i think changing the Taxon screen as you’re proposing makes that screen too complicated.
and before you even think about changes to the Taxon screen, you really need to address the fundamental difference between identifiers of observations and identifiers (of taxa). there are different reasons you might want to get each of these. so i would leave the Identifiers tab on the Observations screen alone.
in my opinion, the right way to address this feature request is to create a new Identifications screen that is similar to the Observations screen. instead of allowing you to query for observations and related statistics, an Identifications screen would allow you to query for identifications and related statistics.
once an Identifications screen exists, then you could link the top identifier in the Taxon screen to the top Identifiers tab in the Identifications screen.
doing things the way i’ve suggested above is not a small thing, which is probably why no action has been taken down this path. still, ultimately, i think going down that path is needed as part of raising the importance of Identifying to a level more equal to that of Observing.