As someone who back in 2010s up to 2016 regularly visits gtaforums to discuss modding and waiting for gta v pc release, I can say no. People back in 2015 launch had issues ranging from simply unable to launch, infinite loading screen, close to the desktop, to missing graphical effects (even after driver update).

In term of recent gta release, gta v definitely is more optimized in a sense but if your information based on something like Digital Foundry retrospective videos... Well idk, since they tested it with "optimized" setting and not in launch version.

Just my 2cent from my past experience.