After playing with the pack, some of my initial gripes about fit have been addressed, though I'm still debating the durability of the hipbelt, harness, and stretch mesh panel.
Here are a few pics.
The fit difference is from what is probably an improvement, since now the load lifters actually function better as load lifters!
Old Exos 58:
New Exos 38:
The shoulder straps and hipbelt are constructed like channels.
Unfortunately, this is stitched inside so that as-is you can't run a hose for a bladder(or my Platy Hoser) through it.
Inside the hipbelt:
The stretch pocket:
A less obvious change is to the side compression straps. On the older Exos they adjust at the top and middle of the pack. Now they have a continuous strap that adjusts top and bottom. I'm not high on this idea, because if you want to compress the bottom half and have the straps run inside the water bottle pocket you can't get to bottom buckle without reaching into the pocket. If I keep the pack, time will tell if it's really a "problem", but it seems inconvenient.
This basically acts as a slide lock. Edit: lets you take out the slack so that all the extra is at the top once you have the pack loaded. Not as inconvenient as I thought it might be, and no real need to use the bottom buckle. Being so familiar with the older Exos, I'm having to "learn" this one a bit, and being very resistant to change, also to get past a slight "different is bad" mentality...starting to like this pack the more I fool around with it.
Another change is that the sleeping pad straps are on the bottom of the pack, and widely spaced. Having bemoaned the loss of an outside pocket for easy access to my shelter, I might actually use these.
With fly and stakes for a TT Notch: