Hi David,
I will not vouch for any indicator simply because I do not use them. If you can read volume and price bars volume delta related indicators are not necessary. However it can be a good tool to visually aid you to see price and volume divergence.
Regarding MP... you can choose to make it as simple as that or more complex than that. It comes down to how you want to use MP in your trading.Are you going to combine MP with other techniques or use MP as a stand alone trading tool? On top of MP pivots like
VAH,
VAl,
POC.... I personally prefer to watch for pattern recognition so I know what type of day we may have. This allows me to place trades accordingly.