The dev are rebuilding the arcade mode from scratch, plus they will add the new night guard in this mode now as to when the new version of arcade mode will be released that is still unknown.
Hmmmmm… Why do you say he needs to lower his graphics i play the 1.9xx version with high graphics with no issues whatsoever but i do have a gaming laptop with a strong graphics card so that helps.
If he/she has a laptop/PC that is not that good and crashes every single time they try to go to work in arcade mode, then they have to do that, because it was happening to me, and lowering my graphics to low fixed it.