You are partially correct, we did change how the increase it shown. (It used to be shown as 130% and now it's 30%).
BUT we also decreased Rage spell lvl 5 from 80% to 70%.
From release notes:
✔ Decreased Rage Spell level 5 damage bonus from 80% to 70%.
Why? We want all max level Spells to be viable options and currently the level 5 Rage Spell is used in almost every single battle by high trophy players - therefore is wasn't optional. By tweaking it to make it less of a mandatory choice, we're hoping to see more diversity in the Spells you bring to battle!
There was a question about this also earlier on this thread, if you'd like to know more about why it was changed, check this:
http://forum.supercell.net/showthrea...77#post1372677
I hope this clarified what was changed and why
