I wouldn't say their necessary in a hole, although I expect this round to be splitting up either the granny/Coco pair or the Soarin/DJ pair.
If it's the latter, then the remaining will be in a hole.
one of those pairs has two idols
and for the reason it would likely end up with votes against Granny if that was happening.
It's only Chrysalis and Pear that don't know Coco has (at least one) idol, which does mean that others are actually going to be afraid to put their hoofs up for starting the wagon against Coco.
Chrysalis is the only one that knows what the paraspites actually do, so while they exist and will enable Coco to be voted out, they're unlikely to come out as nopony is going to tell Chrysalis about said idols. Coco is a threat, that's all the reasoning that is needed to get people against her, no mentions of idols or anything.
I assume the paraspites being activated just has Coco shift those idols around a bit, which would be interesting to see where they actually end up.