Is your feature request related to a problem? Please describe.
The KeyMetrics_Scan Plot is very ugly and puts our library to shame! Its really bad in comparison to the other plots.

Describe the solution you'd like
A super nice heatmap (The Economist style, see attached)!

Describe alternatives you've considered
I considered that maybe we should settle for a moderately nice plot - but after a lot of reflection, I think this function deserves a super nice one!

Additional context