I live in Cypress, so in the same general part of Texas as you. The winds here are so different all year and depend on the season. You'd have to observe your winds a year to know for sure. I think we get our winds mostly from the fronts that come down usually blowing from the northwest to the southeast. It seems the rest of the time (and possibly the most) our winds come up from the Gulf going from the southeast to the northwest.
My pool is lengthwise going north to south. We have 2 skimmers - one on the NW and one on the SE. They work great, and your returns will push debris to the skimmers. It's just nice if they don't have to fight the prevailing winds. I have 6 returns and glad for each one. I wouldn't have minded having an extra on or near the top step to push debris down the steps. I do have a return on the sun shelf - very glad to have it.
I love the design of your pool!!! It will be great! I think the depths will work out fine for your family. Kids either need constant supervision (so it doesn't matter if it's 6" deep), or they're growing faster than you can blink an eye. As someone else said, it's a very personal decision. Did you mention somewhere if ya'll like to play a lot of water sports? That would be my main reason to get a sports pool. We don't, so we enjoy having our deeper end. If I could have had a larger pool, I would have loved having an even deeper end!
Good luck!
Suz