I did reload a save up top and craft some good stuff. The really disappointing bit is I thought that Ancient Rathound skins would be like Rathound skins on steroids. Not the case...different properties, specifically it is lacking the bonus to crit. So all that ultra high quality Super Steel fiber I brought isn't doing much for me. Ah well, shows what I get for metagaming. So I ended up pumping up Biology instead of Tailoring so I can possibly make use of all the new bio ingredients in DC. So far, not much though. No new recipes, so maybe it will help me in some other way. Only thing I've been able to make so far is spirit poisoned throwing knives, which aren't good enough to use up a utility slot for with my build.
For what it's worth, one could 'skin' one of the "augmented rathounds" and manage to get 60+ regular rathound leather, although you might not get it on the first couple of tries but it's possible.
Easiest way to do this would be to go back up the elevator to Eldein's office once the 'last stand sequence' begins and just reload your auto-save until you manage to get at least 1 augmented rathound to appear among the 3 randomly 'spawned' faceless that'll be waiting when you step out of the elevator.
Should be said though that you need to kill all 3 really quick since you won't be able to use the elevator again until you're out of combat in 'technical terms' cause the faceless will keep coming out of the damn walls and so you might have 3-4 turns tops to kill said 3 random faceless and get the 60+ rathound leather that way.
But of course one could just try their luck in the DP elevator room and 'snatch' the skin(s) off augmented rathounds there although it can be quite a 'pain' with so many faceless 'troops' all around you.
Oh and by the way if you actually manage to go up the elevator and back down, expect plenty of faceless in 'different positions' compared to when you left, although at least the Tchortists who were still alive at the time you would go up the elevator would still be alive as well as the elevator to the DP would be one 'notch' away from arriving to your location so basically make a run for the elevator if you can!