VAR is there to review whether an incident (e.g. goal, penalty, mistaken identity etc) can be allowed to stand. Where appropriate, this takes into account an offside consideration. It's not there to review an offside decision on its own.
What would you 'play on' with? Drop ball?
And once the...
I can only agree with that to a point.
True, Gross was through one-on-one, but by the time he had got into the area, the flag had gone up, and the whistle was blown. Schmeichel largely stopped playing - or rather, he didn't make much of an effort to stop it.
Would Gross have scored? Maybe, but...