That is one of the best after action reports of a game I've ever seen assembled with an excellent balance between text and photos (and well captioned photos that enhance the text rather than duplicate it). Then you add in a well-reasoned response to a first-time encounter with a set of rules.
You point up the reasons why I haven't tried British Grenadier - and don't have any plans to do so. And, yes, to the rule's fans, I've already heard it and, no, you aren't likely to change my mind. But keep playing them if they work for you.
I lean on Guns of Liberty by Eric Burgess as my go to AWI rules, for now. Looking forward to his 3rd edition (which I need to check if are out yet, now that I think of it).
Battles didn't happen in sections but simultaneously and I want that from my rules - especially because to my mind such rules give a better flow to the game - and I want a good game first over an accurate tactical game, though the latter does matter to a high degree. Just fun and playable is the first priority.