my biggest issue with waterproof material for pack back is here on the coast, they will get water inside, whether it be through the seams through days of rain, or opening your pack in bad weather.... they do a very good job of shedding the water, but some makes it in and has no way to get back out. i would love to see a stock option to add grommets... i'm sure it's a fairly easy DIY program, but would likely void the warranty from any company... a perfect pack bag for blacktail hunting would be like what Seek Outside builds with grommets in the bottom... i know not everyone would want them, but i bet most would (especially after hunting in heavy rain a few days) water pooling in the bottom of the bag is more annoying than heavy waterlogged cordura.
an option on the order page would be a cool thing from a utilitarian aspect for using waterproof materials in wet weather. i remember buying a waterproof pack a few years ago for winter steelhead fishing, thinking it would be awesome to keep everything dry... got stuff way more wet if it ended up in the bottom of the bag, and same thing happened with my Seek Outside... simple fix, but would void most warranties if the customer did it