The slope actually didn't come out quite as we'd planned. Here is the elevation we had settled on with the builder:
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Note that the first 3 feet of the shallow end is meant to be flat, followed by 10 feet at a 10:1 slope, followed by progressively steeper slopes. Unfortunately the concrete crew poured us with about an 8:1 slope over everything until those last ~5-6 feet before the deepest section where it's a slightly steeper drop. The builder is coming out tomorrow to figure out what happened, because the concrete crew definitely didn't follow the plans we gave them and they'll need to correct it.
As far as the question of whether the slope is too much, from walking in the empty pool I'd say this 8:1 slope is right on the edge of being too steep to comfortably hang out in. Especially because there's no flat section at the start. I think 10:1 would be a more comfortable slope, but if you wanted to combine that with a deep end you'd either need a very long pool or a transition to a steeper slope at some point as we intended to do here.