I know it's tough to encompass slight variations in a poll, but here's my basic take on this situation: I was ready to vote to abolish/suspend the current setup while a better replacement can be devised, but I realized I may have to qualify that point of view.
If making the pathing "broader" (which I assume means making fewer, larger tiles?) will prevent unit stacking then I am willing to accept that outright. However, that too must be qualified because it would make, in theory anyway, the current problem even more severe (ie forcing units to swing far wide of friendly units every time). Units need to swing wider than at present (because currently passing too close causes the pathing freakout which we all are familiar with), but that doesn't have to be 20+ yards.
I understand that changing such a basic facet of the coding for the game would be a monumental task, and as such may not honestly be feasible. However, I don't necessarily like needing/having the option to suspend the pathing for a given unit, as that would essentially double the amount of micromanagemet necessary. Instead of clicking TC to control a regiment, you would also need to click a button to turn off pathing, move said unit, and then likely turn TC off and pathing back on so the AI behavior will keep the regiment turned and firing at the enemy. I personally don't like the notion of having every single one of my units TC'ed at all times and under constant watch, and this seems (broadly) to make it basically a necessity.
Yeah, this is a poll where my choice is also not optional. It's a player's poll, basically to find out whether the quoted pathing concerns are global. What I would like eventually is a smaller tiling system, whereas the troops would avoid collisions and engaged units while maneuvering a tighter course, made possible by the smaller tiled footprint. However, this is a huge undertaking code wise, as well as an exponential hit on performance, and probably won't be ever even considered unless the current pathing system is increasingly unpopular. I'm presently very surprised at the folks that would like the pathing broadened. That would really make the paths long, and more unrealistic. However, larger tiles would help performance, but still, a large coding makeover.
Regarding the stacking, this should be fixed with LOS patch fix. If not, get us a save if it's happening on even terrain. If the distance between unit firing lines is not enough for the elevation, lodge a complaint...we'll definitely look into it. Stacking should be realistic and relative to the elevations involved.