You may not be overthinking at all. I think it depends on the individual. For me, grip shape now seems to matter. In the past I have not seen too much of a difference between different guns. A timer has shown me that I was probably incorrect. I recently attended a class where time and score was very apparent. I ran a G19 with a LTT grip anchor and a G45. I was consistently better with the G19. Enough so that I traded my issued G45 for a G19. It works for both overt "on duty" carry and "off duty" covert carry. When I want/need smaller/ban state compliant characteristics, the G26 works just fine.