I was unable to test it effectively but did get to a populated S rank that was close enough to a Fate and lagged right away and crashed right after so it is not fixed.

As for the 'alt tab' lag, its hard to explain. I am sure you know how the game looks when you alt tab out of a fullscreen borderless, how it runs at like 10 fps since its not priority ran. It seems that is basically what is happening, except I am not actually alt tabbed since my game is still responding to my key clicks. Also, my task manager drops its CPU/GPU usage drops completely also like when I alt tab from the game. I truly have no idea what could be causing it.

The support told me to use windows 7 compatibility, change a few internet explorer options, and a bunch of other stuff. The only thing I really have not tried and am currently trying is reinstalled the game and repatching it. Other then that, I have no clue what is causing it and what I can do to fix it anymore.