This. I tend to shy away from proprietary parts on principle alone.The unfortunate part is that less-informed buyers don't know any better. This is one of the number one reasons I won't buy a specialized. Proprietary crap like this (special linkage designs) has no place on my bikes. Proprietary stuff like Trek DCRV shocks, some of the Scott stuff, Spec Brains, etc., it's all well and good for a few years, but after that, it's not supported and your bike becomes a giant paperweight if something craps out that is no longer supported and available due to being proprietary. Those wacky shock mounts are one of those things. It's not that the smaller builders are always better, but they usually have to "fight" for their customers over these big companies, so they tend to design them for the long haul and are relying less on image and brand recognition. Give me a Guerilla Gravity any day over a Specialized.
Another point: Manufacturers who sell through a licensed dealer network (like Specialized) require the dealer (LBS) to handle the front end of warranty in exchange for the privilege of getting to sell a name-brand product. This arrangement has already been agreed upon by the LBS and the LBS has profited from selling the name-brand product. The consumer paid more money for a name-brand bike bought through the LBS model than he/she would have for a direct-to-consumer model.
The consumer has every right to expect the shop to make this right. Personally, I would never go back to that shop again if the shop doesn't make it right.
I get this is a hardship for the shop, however, and if the shop does make it right, then I would go out of my way to continue supporting them.