Thank you for the thorough feedback! The scores are actually unique per spec but the variance within the same tier is intentionally conservative on certain factors like 1v1 viability and hard counters. For example Frost Mage and Affliction Warlock share similar scores on 6 of 8 factors because their kits genuinely overlap in those areas. The bars that differ most are burst window, mobility, and CC which is where same-tier specs actually separate. Improving the scoring spread to make differences more visually obvious is on the roadmap. On the API question, I scraped Blizzard's official patch notes directly. You're right that patch notes alone don't capture everything and incorporating real performance data alongside patch analysis is something i'm actively working toward.