So again, not to take away from Dylan enthusiasts, just posting my own personal thoughts.
If we're sticking with side story idea then they should be more spread out, right now Dylan is the character the story has focused on the most other than Sophia, and two of Sophia's story's are also directly tied to Dylan. If the PoV is going to switch to other characters, maybe have shorter side stories for all of Sophia's family members; Liam, Dylan, Patricia, and Ellie can all have short little side stories we could cut to, to help influence their characters a bit. I'm not a particularly huge fan of this idea, but for other people that aren't as into Dylan then it makes thing bareable.
There are more creative ways for complications to arrise, while still keeping the focus on Sophia. For example Liam. If Sophia primarily ignores him, he gets that lustful look during the wedding gown scene and we can make a choice for him. Have more of those little flit aways. That's a good way of still influencing the others and how their stories are playing out, while keeping the story primarily focused on Sophia.
Or add in some more variables like Dylan cuck and Ellie Bitch so that the choices Sophia makes influence the behavior of the other characters. Then we only have to leave Sophia for a couple of renders just to get the implication that whether Sophia is intending it or not, she's influecing Dylan / Liam into Cuckholdry or swinging or whatever other variable. An example for this is Dylan; say a couple of times in part one Sophia will be doing something with Dylan then switch to Sam as soon as he enters the picture. This causes Dylan to start building those cuckhold points, so when we get the to scene with Claire at the salon, if Dylan has lets say > 5 cuckhold he won't say anything when he catches Devon staring, but if it's between 2 and 5 he'll mention it, but avert his eyes or otherwise show some sort of submissiveness to Devon, < 2 and he'll jump up and be angry that Devon is perving. All of that can be done without ever giving Dylan PoV. Same for Ellie and Patricia have a couple different variables for them as well let them have a bitch variable and lesbian variable for example.