This one only had a few moments with bows so can only give a few updates.
The Reach of the Red Mother does not currently have 30+ armour penetration.
While aiming, stamina goes down very quickly. Drained stamina bar in maybe three seconds at most. So practice snap shots.
This one did not get to directly target a leg, so cannot say if it cripples. That said, large creatures now have multiple target lock locations, so it is easier to target legs on non humans.
Snapshots take more stamina than they used to, but not by much.
This one did not have enough targets to bounce an arrow in the very brief moment with the bow.
Also, many targets have much lower HP now, so they tend to drop quickly.
Hopefully someone else can fill in the majority of your inquiry.