Kevin, first I'd like to say, I appreciate you coming in here to answer questions, and defend your product. I may not agree with some of the answers and explanations, but it's more than a lot of companies will do, and that alone wins you a lot of respect (which I'm sure you're well aware of since this isn't your first rodeo).
I would argue that loading long is really just maximizing your platform. Especially as we keep seeing longer and longer bullets introduced, such as the 150gr SMK. Being able to load long allows one to take advantage of the incredibly high BC bullets, without loosing a ton of case volume for powder.
I do recognize that the ratio of people who own 6.5CM and people who load 6.5CM is tending to a decline; owed greatly to the reduced costs of quality match 6.5CM available these days. So the more typical shooter likely wouldn't take advantage of the ability to load long. I also recognize that your rifle is likely not being marketed to the consumers who would see this as an issue worth noting.
AI Mags are certainly expensive, and not available at any gun store- so also good points there; your targeted customer base Im sure appreciates this. That said, I wasn't aware of the problems related to the AI mags that you mention, aside from mag retention, where I do recognize that the tilt-in/flip lever isn't as user friendly as the AR style button / straight insert/drop.
As for the max OAL on the .223 AI mags- you may already know this, I'm not sure... but it's a point worth mentioning. .223 AI mags seem to have been discontinued. So that's a clear issue, though non-AI options are out there. But, back to the OAL issue, the plastic AI brand AICS mags will run 2.55". Nearly 0.3" beyond SAAMI Max OAL. Apparently, the MDT mags will do the same, and Accurate mags will as well, with a little Dremel work.
Maybe I'm out of touch, but in my mind, there is little, to no point in a bolt-action .223, if you're stuck limited to ammo you'd run in an AR. The big selling point for me on a bolt action .223 is (comparatively) inexpensive training, with a cartridge that still has considerable performance. But that performance is rather lacking when working within the restrictions of AR mag length.