First of all, if you're saying you've sent a rifle to Remington and received it back in a timely manner, you need to go play the lotto tonight. Seriously. Remington is notorious for long delays in dealing with customer rifles, poor customer communication, and terrible service. I've experience all of the above, on more than one occasion (on parts as well as a whole shotgun being serviced). Your experience with them is literally the first I've heard of which was anything but onerous and lengthy. Mine were onerous and lengthy, for sure.
Second, if you're expecting Weatherby to be able to fully assess your rifle, you need to understand what really needs to be done to it to confirm it is safe to shoot. Having helped confirm an action (a Rem700, if anyone wants to know) which had a grossly overpressure round detonated in it's chamber was alright, I'll walk you through the process we used. We did a visual inspection. Then on a lark (because we had access to a new X-Ray machine at a medical office) we did some X-Rays of it. Then we did what really mattered - checked the lugs for setback (headspace checked, effectively), and sent it to a machine shop with a magnaflux particle testing setup so we could look for hairline cracks inside and out. That was just a few guys doing it, but I'm a hobbyist gunsmith and we had two NASA engineers involved (I live near Marshall Space Flight Center), and we weren't in a hurry at all, but it took us several weeks. Now, if we'd had custom guns to deliver, other service projects to assess and diagnose, while short of staff, while managing a move over 1000mi distance, with all the regular ongoing work of running a B-to-C business, I suspect it would have taken months to work through all the details.
I understand your dad is impatient, and you are impatient. But in this instance, there are some very good things to know. One, the work will be done thoroughly. Two, it's not deer season right now, and won't be for a long while. Three, there's at least a reasonably good chance the action is toast and your dad is going to need a new rifle. Might not be a bad idea to consider if there's something you want, which he would shoot if need be, and go ahead and invest in it. My suspicion is, if the stock is cracked in two places, and the mag box got blown out the bottom, the action is no longer aligned properly, at least, and may well have lug setback along with hairline cracks. Good luck with it.