Scrap VAR for offsides full stop and leave it to the liners. One quick look at 99% of offsides can tell whether or not we think hes on or off and VAR is just complicating it massively. If a 4th official or whoever they are think its a massively glaring mistake, tell the ref to go and look at it on the monitor. No stupid lines or creating offsides, have a quick look and decide. That would be a millon times better than VAR drawing stupid lines regardless of where they set that boundary.