Greetings, I am now back and as fickle as I may sound it isn't my fault...
I am now on my 3rd Asus Rog (Production Date November (EB)). Let me just say that once you have used an Swift and treated to all its glory, there is nothing that can replicate its fluidity (yet) and it is down to its specifications (120Hz+, GSync, 27" - The trifecta of a gaming monitor) + it looks amazing.
I have been back to 27" IPS, 24" TN's and Even tried 4K. Nothing comes close to it. It has been a roller coaster of 4 weeks and I have been severely dissapointed everytime (the closest I could get was a BenQ XL2420Z and that was not a close 2nd at all!).
I have found that the vertial lines in this one (whilest still apparent) was not as servere as the 2nd one (E9 Batch) (E8 Batch was my first and I can't remember thinking anything at the time but how bad i felt when it broke). I have also come to learn that even other TN panels (whilst not having vertical lines, have more of a waffle pattern) have artifacts.
All I need now is for the monitor to stay working and hoping that because it is the latest batch they have added more measures / fixed issues... Suffice to say I will be sticking with the Swift, I have no choice. Thanks Asus!
*Edit* I would like to add that the pixel inversion or vertial lines when moving side ways is significantly less with my EB (Current) than with by E9 monitor and probibly was like my E8 was (since I never noticed it then)
Perhaps all just luck but there you go.