Do you use them frequently? When you first introduce a new location, or EVERY time you visit that location? Are you a fan of tailless dialogue balloons over the establishing shot scene? Do you frequently caption the establishing shot to aid in identifying the location?
I do use them pretty often, but I've been known to discard them if I want the first panel of the page to open with a close shot of surprise action. In the second panel, I can then pull out to reveal more of the scene. It's not exactly an establishing shot, and it does disorient the reader, but it rewards them if they pay close attention.
It helps that Michael is an awesome background artist, so showing these steampunk and cyberpunk cities is not a drawback. That being said, the weaker your artist is at lavish, detailed backgrounds, the more writers tend to shy away from establishing those backgrounds.