Let's be clear, since it seems to be lost on some of the mechanics-first crowd:
The mechanics were not what made people stick with L5R over the span of two decades. The mechanics were often awful, arbitrary, unbalanced, and absurd.
The value of the intellectual property, therefore, is not in the gameplay in and of itself, but in the deep investment in the setting.
FFG will almost certainly do a better job on the mechanical end. That's not something I've seriously seen questioned.
But if they neglect the immersive end, then why buy the IP in the firstplace, since that's literally the most valuable part of it?
This is exactly my stance. It seems to so obvious to me that I am not worried. I LOVE sacrificing sacred cows and would happily give up things like a dishonor victory to make the game smoother. and I am a Scorpion!
I have zero doubt that the game will be better mechanically. And the only reason to buy this game was for the setting.
The only thing people have to do now is stay hype, stay active, and see if the game is something they want to play when it is re-released.