That whole process is fairly similar to what my co-creator and I have done. The tectonics were added as an afterthought, but besides that minor detail we followed your process fairly accurately. Now he's trying to figure out the vagaries of seasons in a binary system while I'm writing what we already know.
Kes, I see your point about the potential for a map to make a writer more lazy in a sort of "refer to figure A for reference" sense. But as a tool for writing the story, I've found it invaluable in the process of creating an accurate description of our world. Mainly due to the accuracy of the work we've put into it, I can glance at a chart and know what season it is, how much light an area gets at what latitude, what color the light is (2 different colored stars) and therefore what color the plants would tend to be.
Which all helps when my protagonist is trekking across the southern wilds during a season of pure daylight due to the way the stars rotate in relation to the planet. The fact that one star is blue also means that my characters encounter reddish plants and can rub leaves on themselves to borrow some evolved UV protection from a chemical the plant secretes.
Also, 'grats on being published, Kes.