I think it really depends a lot on what your target market is. If it's for people with an incest kink, then yeah, the minimum amount of effort to stay within the rules makes sense.
But as
gingersweetgirl has been saying, with a bit more effort, a half-decent product could still be made. It makes no difference to me (as someone who plays the Ellie route) if Ellie is Sophia's daughter or not. She could be the daughter of one of Sophia's family friends from back in their old town, who came to San Alejo for better opportunities for college. You'd even be able to keep all the shower scenes.
Same goes for Patricia. She could simply be Sophia's best friend growing up.
I'm a little busy at the moment, tidying up the dialogue for Free Pass, since the dev for that isn't a native English speaker either, but it's tempting after I've finished that to see if I can make a Patreon-friendly version of AWAM.