The backlash comp doesn’t mean you need to re-home unless you’ve changed the setting after you’ve homed. In that case it might change your absolute postion from when it was homed slightly, but thats ok, your measurements for backlash to tune it in should still work fine, and then when you’ve got it dialed in, just re-home and you should be consistent from then on in your absolution positions each time you home.
The problem with the software backlash compensation is that it can work for some movements and not others depending on the nature of what is causing the backlash. For example, if it is in your gears, then the backlash may easily get taken up on each reversal of direction and the backlash comp should work pretty well. If it was in the belts though, there would likely be enough friction on the smooth part of the belt to show no backlash for slow/low acceleration movements, or it may take time for the teeth to work there way over to the other side of the pully tooth.
On my machine when everthing was pretty new, my raw backlash was between a half and 1.5 thousandth, and the backlash comp worked very well to get rid of it as best I could measure it.