If I commission a custom cue from someone, I don't expect ANY standards...the ONLY standards are MY STANDARDS if I am getting it "custom made" for ME.
What I DON'T like, as a consumer, of ANY product is when the maker designs things of such a unique nature that it FORCES the consumer to return to "them" in order to get work done on the product they purchased. If a customer ordered that particular design for themselves, that is another matter.
If makers of a product are designing something that "improves" what is considered "standard", I have NO PROBLEM with that. I figure if it is eventually found to be "better", then that will become the de facto "standard" until a new improvement comes along.
A prime example of what I am talking about is the Sony company. They have EXCELLENT products, for the most part, but they will design things where you HAVE TO buy stuff from THEM in order to fix your "whatever is broken". I HATE THAT! I received a several-hundred dollar Sony digital camera as a gift once and I IMMEDIATELY returned it because it used proprietary Sony batteries that cost about $40 each at the time. I exchanged it for a Minolta (similar price), with way better specs, that used AA batteries that could be bought anywhere on the planet. As a matter of fact, the camera came with rechargeable AA batteries and a universal charger that could be used anywhere in the world.
If Sony could have convinced me that THEIR battery was somehow WAY better than something that could be obtained, 10 times cheaper, anywhere else, I may have stayed with the Sony.
When I buy a cue from someone, I usually always go back to that person to get work done or to buy a replacement for something. However, there are sometimes that the maker is no longer making cues or too busy to do whatever you need in a timely manner and you may want to look elsewhere for your needs. In that case, it is MUCH easier to get something if there is "somewhat" of a "standard" for the product.
Aloha.

Stepping off my stump.