I know I am not specifically answering your question, but by the same token I am not trying to question your idea.
If you watch the video on Cody Webb's bike here:
https://www.youtube.com/watch?v=-feAR_x5A4AAt around the 4 minute mark they mention they use the Fox shock specifically for the "Bottom Out Control" so that they can run the shock really plush for over the rocks and rough terrain, but when he then does big jumps with flat landings they can control the bottom-out. Sounds a little like a "high tech rubber bumper", but I'm possibly just ignorant.
Looking at the website (
http://www.ridefox.com/product.php?m=mo ... cks&p=3341) the other "feature" it has is that is worth talking about is the "Anti Wallow Control", which "ensures that your rebound adjustments have no effect on compression" - you can replicate this "feature" on your Sachs with a Racetech Rebound Separation Valve which is a lot cheaper and from my own first hand experience it is very effective.
If the main advantage is the bottom-out control then it sounds like it has very specific applications that give it an advantage over the Sachs. I cannot see how it is going to give you much of an advantage for general riding unless you find yourself struggling with bottom-out control a lot.
After having the shim stack changed up in my Sachs to suit my riding I have to say it performs very well. Yesterday I was riding up snotty rocky hills with square edged planks of wood making stairs and helping prevent erosion, and the rear end handled everything beautifully - I could feel it was keeping the rear wheel in contact with the ground as it powered me up.