An interesting blog approach.
The weight of wargaming is certainly with the 28s (or epics) now. When I came up in the hobby, many of us first ventured into the Black Powder periods with sizes 20mm-25s. My initial A.Rev. figs. being 25s, though 15 years later I built up a more complete 15mm AWI collection. Like many lately, what is old is new, and within the past couple years I began collecting back into the larger 28mm scale for the AWI, and in a number of other periods too. Now on a half-dozen or so years of this [ongoing] experience, and with some time to reflect, IMO 28s constrict what I'm able to accomplish with the smaller scales – not just space constricting, but to accomplish getting onto the tabletop.
You've chosen two rules sets that make full use of fleshed-out battalions too – weighty in figs., and they'll look wonderful when painted up, and for taking pictures of.
I'll surmise years will be spent rendering up such units to do even moderate-sized AWI battles with, if someone aims at well-painted figures (and is doing that painting themselves), so to have a battle-ready collection at hand to game with.
Perhaps the battles are less important to accomplish, or ones table space is restricted, and perhaps instead the huge realm of the "petite guerre" in North American offers an alternative scheme to accomplish, and which can be more readily attained with fewer figures, but then maybe that side of the period offers much less motivation to work towards.
I think my post here now reveals a bias I hold towards the gaming side of the hobby, and less towards the painting side. There's many blogs rendering up the next awesomely painted unit on the internet, but the pictures narrow down on "the unit". It's the "battle" that there's far fewer photos of, but when there are, they're certainly epic – and that's somewhat to be expected.
On this board recently, there was discussion of how tactical units might be ratio-ed up, so that fewer stands, of big scale figure units might have the same affect as more numerous maneuver elements are able to accomplish in a battle with. I don't see how that comes out that well, as bigger footprints just won't fit into the same space that many smaller ones can fill.
Well, many of us want the visual spectacle of the big figures – they're wonderful in that regards.
They'll likely occupy a lot more of your time to accomplish the same scope and breadth compared to a wargaming 'tool-box' built up from the smaller scales will.
All miniatures scales have limitations though, and so it's what you value in the hobby I guess.