One problem with battle scenes in movies these days is it's all this fast-cut jiggly camera stuff with extreme closeups on individual soldiers in hand-to-hand combat (in many cases, when actually hand-to-hand combat was incredibly rare, like in the Revolutionary War or Civil War.....there were almost no bayonet wounds in either war) instead of a distant or overhead view showing actual tactics. Oddly enough the Lord of the Rings movies probably did the best job of this.
Stone SORT of tried to do this with Gaugamela with the view from the Eagle overhead, but it was still too hard to follow.
Yes, I liked the overhead shots with the Eagle.
The Russian version of "War and Peace" does a really good job of the battle of Borodino just the way you describe.
You are so right re the "fast-cut jiggly camera stuff." It is meant to hide the fact that Hollywood apparently no longer employs such experts in battlefield choreography as Yakima Kanutt (one time stunt rider and later did battles for El Cid and the chariot race in Ben Hur among many others.) Whoever did Braveheart's battle scene was WAY ahead of the jerks who did Gladiator and Alexander.