One thing that keeps me on the sidelines is their lack of batching/ability to track the slides and frames. I've heard that a rather small number of slides were affected by the bad bar stock, yet, we've seen guns from the low #400's to upper #1100's have cracked slides. This just seems irresponsible.
Correct me if I'm wrong, but it seems like they just dump the slides in a huge bin as they get more in from the manufacturer, and just randomly pull one out and assemble an R9, with a randomly plucked frame.
In my experience, sequentially batching frames and slides makes trouble-shooting much easier. If you get a bad group of slides, no big deal. Just pull the records e.g. "let's see, that bad batch of slides went on #1000-#1050." Then it's simple to both 1) do a recall if necessary, and 2) determine if more than one batch was bad. "Humm, we've had cracks on #800-#850, maybe there's a problem with that batch as well."
With the recent R9 slide cracks, what's to say there haven't been multiple bad batches? You'd never know since everything is willy-nilly & co-mingled regarding assembly.