I don't doubt this though I can also see having access to all this information leading one to needlessly obsess over that which they can't control. Particularly when it's a sealed box battery, all you can really do when these numbers start to go off the rails is hope that you can file a warranty claim. If you're out of warranty or the company won't play ball on the claim, I don't see the info as being all that valuable.You will really appreciate cell level monitoring when you have issues beyond just overall battery voltage.
The shunt options are great for tracking the status of the bank, and triggering actions like disabling charging when the temperature is too low, activating a charger when the voltage is low, etc.
The cell level monitoring is ideal when you are trying to understand the state of health, cell imbalances, IR, etc.
Ideally, you would have access to both, even if you don't use them all the time.