Make insidious an activatable ability.

I think to make insidious a bit more viable it needs to activatable when you need it, as in you can activate with a button.
This way you can pull of some maneuvers otherwise couldn't. Like for instance if you were playing the wraith or the pig, you could actually use it in combination with the power to fool the survivors. It could possibly be reworked a little bit so that it worked for a short while moving but would then go on cooldown for something like 15-30 seconds.

Example

As wraith when they don't see you, then you ding the bell twice making it seem like you're cloaking, then activate insidious making it seem like you actually did cloak, which could then be used to surprise and really punish them.

Making insidious this way could really lead to some very interesting and very useful situations.

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