That's easy for you to say when you've never stated what would reasonably fall within that 30% range.
It seems EVERY divergence they've made from the d20 system, you complain about. I've yet to hear you say "well, that's not in the d20 rules, but that's part of the 30% I'll let go". Sorry to say, but you're expecting a 100% compliance. Atleast based on the fact that you complain about any variations.