It looks like you have a lot of decking on the right side of the plan, are you adding a pergola or future outdoor kitchen? If that is going to be an entertaining space, you may want to consider flipping your pool to have the tanning shelf, steps, and shallow end next to that space. People that aren’t in the pool will likely want to hang out and talk with those in that area. Or adults may layout on the deck, then dip in the pool to cool off abs right back on the deck.
On second thought, since you mention your house being west facing and you’re wondering about shade options, I would flip the deck/pergola area to the other side so its on the south side. The sun will be in the southern sky so if you had a pergola close to the pool or cantilever umbrellas, it could provide some shade over the tanning shelf. Likewise umbrella sleeves in the tanning shelf and along the west side could provide shade in the afternoon. As your design is now, the sun would reflect off of the pool into that deck area.
Our backyard faces due west as well a we placed the pergola to provide afternoon shade on the shallow end. I’m trying to come up with additional shade options as well from a retractable awning off the front of the pergola to a 13’-15’ cantilever umbrella at the corner of the spa/pergola (it could shade/provide privacy for the spa (tilted) or swing out over the pool), or a triangle shade sail (attached to the pergola, our existing patio and a pole to the right of the spa).
Since it’s sunny right now, here’s a current pic of our pool. Since it’s almost the winter Solistice the sun is the most southern in the sky right now and it’s still early so the pergola shade is covering the spa now. In the afternoon a good portion of the pool is shaded.
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