Jeff,
Only walked a few holes at Essex but it did seem really flat. I would put Georgian Bay, Osprey Heathlands, St. Thomas, Deerhurst, and National Pines ahead of Essex based on my brief (and I do emphasis brief) visit to Essex. I did enjoy Roseland the couple of times I played there. Perhaps similar green complexes would be found at Essex?
Essex has more interesting holes than Roseland, and is more demanding in strategy. I understand from jeff, that they are going to begin a renovation shortly - expanding the greens, bringing the exterior contours and mounds more into play etc.
Unfortunately, the powers that be (City of Windsor) have decided over the years to narrow Roseland's fairways and reduce the size of the greens. The mounding and surrounds on the greens are now collars of rough.
If they shaved down some of the mounds and contours then you'd have excellent green complexes. The bunkering is another story altogether - reduced the bunker heights, filled with some kind of aggregate that I wouldn't use to make bricks.
The only 'improvements' the past couple of years has been the removal of about a hundred trees, primarily due to ash bore disease and recently wind storms.
Despite the above, it is still my favourite local course.