Here's a random thought and my point of view.
If VAR cannot make a decision within 60 seconds of viewing the "case" then it most certainly is not a clear and obvious case and the referees on-field instant decision (whatever that decision was) should stand. I think a simple ruling like that would also go someway to reducing the blatant corruption that is
clear and fcukin obvious and exists blatantly in our game today.
But hey ho what the fk do I know I am just plain and simple dude that tries to make life as simple as it can be
Do actually think that a time limit on VAR calls would be a decent result