VAR if implemented properly would be great. Unfortunately, all its introduction has proven is the guys running it are thick, like actually, seriously stupid. As has already been said, the logic of their statement for Son's red card makes absolutely zero sense, it would mean about 19 red cards per game.
The offsides are even more ridiculous, as well as Son you have the Firmino one and one for Sterling first game of the season i think. The technology is just not good enough to determine offside to that degree of accuracy - I suspect the PGMOL might actually be too dumb to understand this.
I do like the idea of a time limit. If you cannot tell within 30 seconds, it aint clear and obvious