I agree with Robbo above. As we waited so long they should have gone for the simplest system possible to start with.
All VAR needed to be was a system to get rid of the obvious errors:
> Goals for and against with a clear error (i.e. Mendes style, Terry Henry handball, miles offside)
> Red cards for violent conduct not seen.
> Obvious penalties not seen.
Basically a Video Ref alerts the on pitch ref to a f**k up, similar to how the goal line tech alerts them.
There should be whole match days without a single VAR call imo -- as it is, every goal you have to look at the ref to see whats happening.
This slow motion stuff is ridiculous (The Women's WC was a total embarrassment for VAR, but commentators / pundits just makes excuses).