is there any signs that coil packs are starting to wear out and if so what are they and how quickly should they be addresed??

 

You might see some white arcing marks from either the wires, or on the pack itself.

 

You will start to get random misfires, worse while under load. It will get to the point where you won't be able to drive the thing because it won't be producing a hot enough spark.

Most often, the overmolded plastic case will crack due to corrosion on the coil stack.