So it's weird- I restarted the game and started getting better load times in some modes but not in others. Some as short as 14-15 seconds versus 20-ish on consoles.
I have to run the game borderless windowed to get the right aspect ration (ultra-wide monitor), but this causes some slight performance issues in most games for me and I think this is one of them. Will try forcing 16:9 before playing next time and try full-screen. As-is I noticed some frame drops here and there- reminded me of the Switch port.
Got some matches online. The first was AWFUL and so laggy I could barely do anything. Others were better. About the same as the consoles. I played a guy and beat him the first two matches, then he switched to Shizumaru and kept getting me. It would be down to no life and he kept winning.
Not my night for it.
I think the game looks a bit sharper than the PS4 version. My monitor isn't 4K so I might install this on my laptop and try seeing how it runs on a 4K TV.