My 2 cents: Even during a verbal, dead ball appeal, I will ask a coach to have the players male the physical appeal also. It is NOT required, but as a matter of game management I find it helps when everybody can see what is happening.
I think some here may not like this, but I kind of do. It's just a little weird for the play to end (no subsequent play happens), the coach to say "She missed the tag up on third." And the ump to reply "Yep. Runner is out." It doesn't take much for someone to walk the ball over to third and step on the base, and at least then everybody knows what just happened.