Agreed, I think the VAR system should be there for the on pitch official(s) to be able to go and look at something if his view was obscured or was a close call, not for a bloke 100 miles away not involved with proceedings to have his interpretation on what he thinks he's seen when slowed down from 20 different angles.
At worst, the 4th official should be the one steering the on pitch ref that he may want to review something.
The hand ball/penalty/no goal needs to be sorted out properly as well, take out any ambiguity.