Terrific article Koppi!
I've seen the allure of doing the great battles of history resonate in our hobby for decades (it's almost become an obsession for some).
Our group has wrestled with this desire for visual fidelity, while hoping to attain battlefield context and historical relevance on the tabletop too - we have concluded that doing battlefield snippets gives us the best possibility of blending these two goals, within a reasonable time for completion.
With the hobbyist painter in mind, maybe the preparation process is much of the goal, but with the wargamer, the realized end product on the tabletop should be achieved (and with the later objective - that's where the compromise often resides).
The "Waterloo Campaign", or "Epic Battles" - are just Warlord's sales pitch. If interested in this scale and its new offerings, someone should buy what is practical. After all, this hobby (for most) shouldn't devolve into a working career, but might be something we gain reward and satisfaction from, through 'reasonably' attaining our goals