[2020] Delay Issues

That sounds very weird, as if the game can't load the required animations/textures from memory. I would suggest running both HDD tests and RAM tests. You can also try to run FFXIV from the 1TB HDD instead of the SSD to see if that fixes the issues, but if I remember correctly, that would require a reinstall (not sure, apologies!).

You system certainly looks like it should be able to easily handle the game, even if the 3770k is over 5 years old at this point.

No worries. Hearing that, it might also be the CPU that is clogged up by something. Especially virus scanners tend to be very CPU intensive while they scan and access the system bus while playing. Some/most virus scanners also check every file that gets loaded into the RAM, and if that takes a while (for instance because the virus scanner is currently scanning a large file in the background), it could theoretically also cause these symptoms. So that may also be worth looking into!