Onion behaviors
A double toggle or transparency of when certain behaviors are enabled. i.e; "Triggers". Show like an onion skin of both on and off effects. Similar to the snapshot feature but instead it transparent throughout the entire timeline. The "dragger" behavior would definitely benefit from this.
Or better yet, a second "scene" window showing all the animation if all the behaviors were toggled off and another with the behaviors toggled on.

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Chris Keller commented
This just got me thinking... for the frame-by-frame even if it pops back to neutral pose, a ghosted image of what it would look like with everything unarmed, and as it looks in the final render, would do the trick! you'd still have to start over at each keyframe, but at least you'd know where things are supposed to be.
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Chris Keller commented
Yes, we NEED onion skinning (prev/next frames or prev/next keyframe)
And we really need better frame-by-frame animation capability.