My thought was that they will instant evolve and kinda "start" at evolution level 3 (due to being twins and both evolving).
Even with a sudden evolution there is no way they are gonna jump from level 1 to level 3 like that (Possible? Sure Henri did it going from level 1 to 5 but he was an extremely unusual case and look where that got him...he's bootleg joker now).
But Henri notably wasn't in a fucked up state when he did the back to back evolving so its unlikely that Liz & Amber will do it...even more so when we see Liz's head in Cole's hand).
They'd still be vastly outmatch due to having no training whatsoever with their powers.
It'd just be bad storytelling especially with how fucked up both of them were...sure they'd get a boost for a bit which we saw with MC & Alice (newly reformed Deryl too) but they still got bitched by Charlie.
I get that people like the twins but this is insane levels of more or less cope to bring them back that'd just ruin the story.
Well not that insane, people on the discord believe in Amber Liz fusion.