Yep, I do all of the things Puzz describes, except ungrouping my infantry line when moving quickly. They do "March Quickly" when grouped, but it seems that the speed at which they move is "lowest common denominator" --they will "March Quickly" at the rate of the slowest unit in the group. That has been my observation (but I haven't tested that mathematically). I will have to try ungrouping, but my concern is that then they will break the strict line formation. In STW this was the problem, and why I kept them grouped.

My commmon numbered groups are:

Guns/ranged line
Infantry Line
Infantry Shock if mixed unit type
Right Flank Cav
Left Flank cav
All Cav except Gen

Given Puzz's advice re: mixing unit types when engaging and splitting out, I will be trying mixed infantry subgroups too, probably left, center, and right groups.

I only use "hard" groups (non-numbered, with the bar across the top of the tabs) to move into tailored positions after moving into a general position in all-group. Of course, I use all-group to swivel my entire army if I need to while maintaining the formation the army is currently in.

The last tip Puzz offers regarding setting up from left to right in tab order is really helpful in combat. IIRC, I don't think you could do this in STW, and I really loved the feature once I made the transition to VI.