Yeah, people probably only play as Violet's slave or just kinda vanilla when using Violet as MC's slave, cuz you can be very harsh to her and she will still obeyed MC, the fact that Violet can become very submissive is such great scenarios and wasted potential for that Matt and Violet conflicts.
This is why i think that MC can forced Violet to become Matt's slave, cuz if you treated her very harsh, it's kinda realistic that scenario happened and the fact that MC starting from kinda dislike being Matt's slave and slowly accepting the fact that she actually loved being treated that way and see herself fully submitting to him.
Of course, im not saying that's the only way for that conflicts can be explored, cuz you can also created a scenarios where Matt's wanted MC to force Violet to submit to Matt but she declined, and Matt using MC to get blackmail materials to blackmail Violet and submit to her like a photos or videos of her getting degraded by MC during their kinky session.
Considering Matt is a douchebag and good at blackmailing MC, he can also do that to Violet, and because Violet from such a very rich family, she will care about what others think about her and her family if those photos or videos got leaked, it's different between became infamous because of her brat personality and become infamous because of huge scandal like that, so I dont think she will be brave enough to go against Matt if that happens, so yeah, it is wasted potential lol