I also think that it is being used too often when it really isn't needed. If there was a system, like tennis or cricket, where a team captain would have a set number (2 per half) appeals and if they use them up, they don't get any more. It is supposed to be used when there is a clear error by the ref, not a toenail offside, so if the players don't think it is a clear error, then don't get VAR involved.
Edit: and to steal another one from rugby, only the captain is allowed to speak to the ref.