I can poke soft spots in the plywood, but can't poke all the way through it. The torch down was reapplied today. I will wait until the next rain to verify that it doesn't leak.From the looks of the pic, that plywood is probably gone already. I see sagging and blackness, not just minor water staining. You need to inspect it carefully if you're not going to replace it. The joists/rafters look OK but I'd poke at the top edges of them checking for softness with a flat-bladed screwdriver. If there's more than an inch or two of slight softness in more than a few places, you need to pull the plywood in that area for a thorough inspection which makes plywood replacement almost mandatory since you're not likely to get it pulled without damaging it.