Sounds just about right to me! As your CYA level stabilizes you are starting to see the subtle effect of tweaking the SWG output on CL production. And you can also adjust your run time too. You may also notice your pH creeping up. It seems to be a natural side effect of the SWG process. Just control as necessary with MA. The next challenge will be to see how you adjust to the next big rain and dilution. Here in CA we don't get much rain in the summer months, not enough to worry about having to drain the pool. This was the first year since putting in the SWG 15 years ago that we got late May rain storms and I had to fire up the siphon to drain some water out of the pool after I had already opened and got everything dialed in. I had to rebalance my salt/CYA/other stuff it was like a mini pool opening..
It rains almost daily here, but the sun it brutal.
I have my SWG running about 12 hours a day right now (7:30AM to 7:30PM) (I figured I am better off having it produce more chlorine than less at this stage).
Once I am confident that my CYA is about 70 (which looks like Ideal per the chart), I will then start tweeking to a FC level of about 5 by reducing my SWG down 5% a day or so. If I hit 50%, I plan on looking into reducing the pool run time.
End Goal being a SWG that runs ~50% and whatever run time is needed to sustain that.