It's far more complicated than what they originally thought, and thus it could have bugs I.E a fully inflated tyres increases the grip level by 1003%, instead of a realistic tyre pressure which would have more grip.
I'd rather wait in interest and be amazed of how the tyre works, instead of thinking of what could be wrong, because nothing I would or have said would ever change the final decision is.
The problem could be a good few pages of A4 papers worth, and frankly I don't worry too much about it, I've been in LFS long enough to trust that things get done, the right way, waits can be longer, but the final product is so much greater than expected, always.
Don't get me wrong, I hope the absolute best for LFS, As it's been in my life, half the time of it so I wouldn't like if it disappeared.