I've been pretty critical about a lot of things regarding the Scott catalog and the business practices of Amos Publishing.
As much as I dislike inconsistent Scott editorial policy regarding catalog numbering and when a stamp qualifies for a major Scott number (i.e., all numbers and capital letters), I'm afraid the solution is not as simple as one might think.
I could list out literally dozens of difficulties. In addition, there are in fact many many alternative numbering systems available (not all of which have died out). More recently, the 1847 website was given a cease and desist order (thank you Amos! -- for providing another great example of stupidity), and was forced to adopt an alternative numbering system. There have also been numerous grass-roots development of numbering systems (well before the openplatform/wikipedia age).
I can tell you the #1 reason why it is so difficult to successfully "change" the Scott numbering system or develop a new acceptable alternative --
You can please some of the people some of the time, but you can't please all the people all the time.
You just can't make everybody happy. Changing something might make one small group happy but then alienate a much larger group. Part of the beauty of this hobby is that there will be differences of opinion regarding how to collect. Often, the catalogs will run counter to what and how we collect. Therefore, from this perspective, I've always viewed the catalogs as an information database, rather than something that is authoritative or systematic. At least, that viewpoint helps me reduce the frustration of using the Scott catalogs, and also allows me to enjoy the many other catalogs as well.
Just my opinion. Certainly interested in reading the opinions of others!
I would also like to mention that Scott actually successfully did a major renumbering of the entire world-wide catalog in the early 20th Century. If you happen to see one of the early 20th Century catalogs, you will realize how significant the renumbering. I say it was successful because Scott is still in business today. So, it IS possible.

k