There are so many ways they could implement good camp followers for an evil route. Off the top of my head, they literally gave every potential player character a tadpole capable of manipulating the minds of others along with the potential for enhanced psionic abilities. Why not let the evil route let you be a more powerful Shadow Prince? Use the tadpole to alter the personalities and natures of other characters to force them to your side. This way later evil camp companions could be drawn from any pool of characters, provided they can be affected by the tadpole. (This mostly makes sense for bending/breaking followers of the Absolute, but who knows where Larian is taking the newfound psionic abilities. Maybe each good/neutral companion/follower can have an evil tadpole-ized version). It would also provide for a non-murderhobo kind of evil. It also lets evil characters recruit followers to camp that would otherwise be murdered, saving the evil route from the content plague. Perhaps in a neutral playthrough you could turn evil characters to good like:
https://tvtropes.org/pmwiki/pmwiki.php/Main/BrainwashingForTheGreaterGoodI also think there's potential for Glut to be a camp follower, if you can persuade it before/after killing Spaw/Duergar that it will be better off sticking with your party. An expansionist myconid follower could be really cool. (Though that might just be my interest in strange and unique concepts. I'd just as soon pick up a Kenku or Warforged follower). Or if when you do all 3 major favors for Spaw, one of his myconids begins to follow your camp (think that's good route though).
(Also I'm getting really nervous about the prospect of being forced to choose between characters (Lae'zel vs. Shadowheart) when Larian is already giving us so few companions relative to ALL other major RPGs out there. It worked in Baldur's Gate 2 because you had many viable, interesting, and talkative alternatives when you were forced to make a choice. That won't work here. Bit of nonsense if you ask me.)
