Anyway, stuff. The issue with the spider..... and perhaps issue is to strong a word. Thematic space. When designing a game you want each part to be thematic and feel unique. The spider exist to threaten the empire.... but they want to be included as part of it? The spider are there to be the foil to the more honorable clans.... but that's the scorpion. The spider is there to threaten the clans that are weak? But the lion is there specifically to knock down the clans that grow too powerful and ambitious.They are a neat idea, and if the scorpion never came back they might even have a really good place for them to fit... but there are a lot of people who feel that having one clan of dishonorable bastards who do what they want for sketchy reasons is more than enough.
Shourido is kind of a neat idea, academically, but giving it the same mechanical weight as bushido is a mistake. Let people believe this new philosophy, but the get low honor scores, not something new in its place
And the thing you (and many people) are not getting is that the Spider players never really wanted the spider to be a great clan. The storyline choice that was presented to the spider players wasn't a choice at all...
So that just throws everything you just said out the window because we never wanted the spider to be there to begin with. We liked being the organized evil outside of Rokugan trying to corrupt it. We didn't want to go back to just being the unorganized horde monsters and let the spider go away so the only other option was for the spider to become a great clan. This 'choice' was forced upon us. Nobody (including players of other clans) liked this at all.