Sorry for the lack of pictures - will update those soon. We're making what seems to me to be great progress - the pool is dug, trenching began today (and might actually be done, come to think of it). They've started laying out the plumbing and they leveled the ground for the decking (we'll have a sunny seating area off the master bedroom and a shaded one off the den, then one step down to the pool and barbecue area, so those two levels have been laid out and marked). We discussed items related to the gunite - shape of the steps, bench location, spa jet heights - and I let the coordinator know that we're going to have a line of tile marking the steps and bench. We decided that for a bit of contrast we're going to make the coping a bit darker than the rest of the deck. We also added a couple of inches to the depth so it'll be 50 inches max water depth.
@Liz, I liked the waterline tile as step marker because, as you say, it does tie everything together. In addition, my terrible eyesight will appreciate the bit of contrast when looking for steps and the bench. My spouse was initially resistant, but we found enough nice-looking photos to get on the same page. The wall was easily dealt with...and there was a (no longer in use) septic tank that had to be filled in, but all has gone well.
When they had started digging it looked like we were squeezing too much into a small space, but now that it's all taking shape, I think it'll be really nice (and well worth the cost of water and Gatorade that I didn't initially foresee)!