If you’re having input lag in World of Warcraft, chances are it’s because you’re using a version of WINE that has a bug for this. Until this is fixed, the solution I’ve found is switching your runner to lutris-4.16-x86_64. If you’re on any version higher than that, be it 4.17, or even 5.7, you will get annoying input lag on your keyboard inputs (character movement, etc).
I’ve reported this bug to the WINE devs, and if you have this issue, it would be appreciated if you posted your comments on how it impacts you in the relevant bug report, found here : https://bugs.winehq.org/show_bug.cgi?id=49423
I’m hoping some day soon it gets fixed, so we can start using newer versions of WINE for World of Warcraft again, but until then, this is the solution I’ve found.
Hope it helps!