Is it too late to change the shallow end to at least 3.5' (LOVE 4' depth to tell the truth and the transition to the 7' is slower as well)? 3' is too shallow for a good crawl stroke. Measure where 3' of water will hit you as well. Also is this water depth or from the floor to the bottom of the coping? VERY important difference as water depth is measured from the floor to half way up the skimmer face.
So, I'm a bit roundish when it comes to measurements (I know, doesn't make for the best construction) but if I remember correctly, our PB said the shallow end would be 3.5' deep (bottom to half-way up the waterline tile).
We have also decided to put in a seat in one of the corners at the deep end. I was concerned with getting in and out of the pool down there - and didn't want a ladder with the metal rail sticking out. PB suggested a seat - large enough to sit on and then step up and out, but small enough to not be intrusive.
Will check back in next week with this week's progress.