Hi Will - maybe a better way for me to describe the problem is that the grid is not always used only for snapping on to, it also serves as a visual indicator of scale.

It works for that just when doing any normal kind of drawing or modeling, even if your current operation does not involve snapping to the grid.

With the automatic-changing kind of a grid, this other purpose of the grid tends to be degraded, the grid is no longer like a legend showing you one particular unit size anymore.

That tends to be frustrating if you were relying on the grid to provide visual cues for what size you are currently viewing.

- Michael