I admit I do like Rachel as her bitchy appearance and attitude has me attracted, but for the sake of artistic integrity that'd be a silly idea.
Also yeah she does feel like one of the major characters, hell, to me she's the game's main antagonist so removing her this early doesn't work well(?)... I guess? If for some reason MrDots decides to remove her, it leaves open a massive hole in the plot since now there's no threat to be found. You could argue that dating multiple girls will be the friction in the updates to come, but what about for the loyal "D-Only" folks?