Well, I just got done and finished up all the content for this current version (06.5), and I got to say I am extremely impressed with how complex and dynamic the characters are and their individual situations. It's a bit unfair to say at the moment, but Sabrina is definitely my favorite storyline and had me invested from start to finish.
I love how Jon (for almost all of the LIs in Demon Deals) gradually goes from an avatar of Lust that Lilith would be proud of, but as he gets to know the variety of women, he becomes empathetic and wins them over majorly with his personality, and doesn't abuse the gifts given to him. Yes, his magical dick draws the women in, but Jon is honestly a smart and reasonable character who is aware of his imperfections who win the LIs with his heart. He talks the talk just as much as he walks it.
For example with Sabrina, Jon discovers/points out that Sabrina was an abandoned, lonely child who was stuck in foster care for the majority of her youth, but has been for some years now apart of an unorthodox yet stable family that Sabrina blatantly ignores for something she has already been in possession of for a while now (People who love and cherish her existence including Jon). Granted, she didn't realize before the summoning already took place, but Sabrina when we first met her: would stubbornly NEVER admit to her demonic activities as being wasteful towards her goals and shut out all outside suggestions. Her growth over her storyline is simply amazing. Additionally, Jon going the extra step of making companions for Pins (Sabrina's doll) was a nice touch, as well as during Brenda's storyline, Jon going around dropping off copies of Brenda's books around Vesper.
Finally, I know both of their respective storylines are finished, but it would be nice to see both the new and improved Sabrina and Brenda interacting with the rest of the cast and their environment(s) with new perspectives. In particular, Sabrina and her newfound bestie Ashley, and Brenda with Leslie/Mom as well as Cassie/Aunt, who Brenda seems to have some things in common with that Jon points out. Please keep up the good work, Breadman.
Side note: In my opinion, Lucia, Rebekah, Brandy, Chiwa, Ariana, and Oluchi's figures are the best in the game, especially, Lucia's. Well done with the art direction in general of the cast. There's barely any women I don't find my cup of tea.