I'd say the worst thing is how the "high bar" was dramatically reduced this weekend without anyone being told.
Before this weekend: 90 games - no VAR penalties.
This weekend: 10 games - 4 VAR penalties.
As we're seeing today, with two VAR penalties awarded, they have clearly moved the goalposts/lowered the high bar that was previously in place.
First 90 games of the season: 0 (zero) VAR penalties awarded.
Next 10 games: 3 penalties (and counting)
We got lucky, possibly fortunate beneficiaries of all the non-penalty discussion from last weekend, most notably the Vertonghen / Deulofeu stone-waller that wasn't given, as that was the first penalty awarded by VAR, ie it wasn't initially given on-the-field.
Interesting discussion on 5Live...