I'm not sure I agree with the foam, I've packed out well over a dozen bulls with my duplex and it's still going strong after like 8 years. I do agree with their crap customer service, I've had 2 issues, one with a broken clip where they told me I must have used the pack wrong and the second I had to pay for a sewing repair on my hip belt after it tore packing salt throughout the summer when the pack was less than a year old.
I think they are out in left field now, IMO their new gear is much worse than 5 years ago, bags are not well thought out, IMO the Ark frame is a very poorly thought-out frame. I posted about mine last fall and have since sold it. I still have a couple of duplex frames one with an Exo bag and one with a newer Absoroka bag and like them. I just bought a K4 so we will see how it compares hopefully I'll be packing a deer in it next week.
I think almost every other pack designer out has better bag designs, the best bag kifaru ever made was the Timberline series. Since then the bags just don't make sense to me, Exo and SG definitely do much better in the bag department.