A very simple "ruler scale" under the power meter bar that has a numbered scale showing how many kilowatts the bar corresponds to would be AMAZING. It doesn't have to be a linear scale. It could have increments of 1 from 0 through 20 (normal cruising power) and then perhaps every 10 up to the maximum value.
See below for a quick photoshop of what it may look like....substitute mm for kW!
See below for a quick photoshop of what it may look like....substitute mm for kW!