Agreed. And actually right at the beginning of the second half it was more like a 4-1-1-4 for a little while.
It's been looking to me like Domé's "safe default" formation is 4-2-3-1 with a fluid front 3-1, with fullbacks getting up when in possession and dropping back when out of possession.
Also agreed. Over the past decade the game has become far more fluid, with players tasked with a wider range of responsibilities, than can be expressed with a numerical shorthand from a more tactically rigid era. While watching yesterday I was doing a lot of brainstorming about a better, modern way of visualizing tactics, but it got a bit weedy when I was imagining three-axis charts and flexing polygons and color gradients and ratios being transformed by various functions.