Huh, I was just wondering if eightblack was going to step up again after a year's hiatus, and I find this.
In terms of dates, you definitely want to completely avoid Ramadan (6/28-7/28). You also want to make sure you hit the summer "low" season, when the prices come down from their typical astronomical levels. The combination is mainly why DubaiDo was always in June in the past. This also nicely hit the Park Hyatt's summer sale.

It's probably also wise to avoid going into September as you will start to step on several other Fall events and all the summer sales will be ending.
I personally could (currently) work with the mid-June window of the original three DubaiDos, as well as most of August.
If the dates line up and I can make it, I'd be happy to help out (I think I get veteran attendee status, right?). I might even be able to tap a contact at DOH airport (a short hop away).