Likes and dislikes for Hyperion aside, I think what is turning a lot of 4.0 users and perspective users against the idea of 4.1 is the name itself!
After reading quite a bit about 4.1, I realized that the major error with it is its TITLE!
Supposedly 4.1 is rebuilt from the kernel up right? I personally would call that a major change! The title "4.1" leads to the thought that this is only an upgrade and going from 4.0 to 4.1 a minor one at that. They can say all they want, but the first thing people will see is that version number change and say, "Oh, it's just an upgrade".
So if the title portrays the mindset that this is just an upgrade, of course people who paid good money for 4.0 will want an option to step-up to 4.1 at a discount. It would only be fair right?
And people who installed and used 4.0 with lackluster results are easily justified in thinking 4.1 won't be any better since, again, it is just a minor up date.
I think that if this came out under a completely different number (5.0) like they do with major changers in Linux flavors or a separate name (Sorry, not feeling creative to make up a name on the spot) it MIGHT have changed the way people looked at the newest version of the OS.
Heck, 4.5 would have lent to a better idea of the major changes put into this package...
My two cents.