The whole idea was to make their own low deflection patent without infringing on other patents. It wasn't about strength at all, it was about weight, that's why the carbon fibre pad on top of the ferrule was an integral part of the design.
In my opionon that was also the crux of the problem, players don't pay attention to stuff like that and if you had a worn black tip, it could be hard to spot that carbon fibre plate, so many just took the whole thing off when they replaced the tip, which led to ferrule failiure pretty quick.