I posted before about buying a lot, and was mocked. I've already talked about stocking up and wishing I had noticed your warnings from a year ago.
I don't doubt their competence, but you yourself have made it sound like it is increasingly difficult to import medications. But is it easier with a larger order or a smaller order? Does it not matter? That's my only issue.
I can only speak in generalities. Smaller packs, all other things being equal, are more likely to fly under the radar because, for the effort of manual inspection. a big box of contraband has a much bigger "reward" than a tiny box. But 16 kits is a small box.
The Chinese package consolidation system, where thousands of packs are sent in a container, then once it arrives, relabeled, and shipped like domestic package continues to work very well. If you aren't aware, CBP gets all the customs paperwork for every pack in the container before it arrives. Then they either flag the container for inspection and it's brought to them, or advance clear it (90%+ of the time) and it gets put on a truck and leaves the airport.
Chinese shipping companies still seem to have a much better success rate than poor India Post. Not the 99.99% it had before, but pretty good. Seizures are fairly rare. I assume the Chinese have figured out how to massage the paperwork to avoid red flags. Probobly some other tricks being used. A government memo said something about Chinese companies stuffing a bunch of small packs into one larger box as a way to sneak contraband in, so they're resorting to using some tricks, and customs finds them, occasionally.
If you're looking for a reason to be concerned, timing isn't great for things arriving now. With the rest of the world pausing parcel shipments there's not nearly as much coming in to overwhelm the system as there was last year. So the capacity to inspect represents a higher proportion than before. But that will only last a week or two. Then, at least in the short term there will be a flood of backlogged international packs, and worst case scenario, if you need a reship it'll have much better odds of making it. Besides, their policy is if a reship to the US fails, you're entitled to a refund.
Also as you said nothing is controlled. So you aren't even facing the risk of a love letter.
Odds are well in your favor it'll arrive and all this discussion will be moot,
Going forward though, I don't expect things to get any easier, It's never going back to the way it was when you could look at a year of posts on QSCs thread and not read about a single seizure of something shipped from China.