Season start was filmed last year, so a few things have changed since then.
Top&JG excitement and select look good, esp for average play.
This resulted in some sadness for bot; the roles are still being balanced. 13.1 hits some of the anti-bot outliers (mundo, ramm, jak'sho) and we've started work on some satisfaction passes for ADC.
We're continuing to look at healing outliers post ravenous and tank changes. We have some small scope changes to GW in a few patches or so and are testing well (small component gives 40% is the main one)
Notes from the vid; we don't consider legendary rush an abuse case (BORK/Demonic/Sunfire) and we'll continue supporting non-mythic rush
AP item and mage satisfaction is on our radar, we've buffed a few outliers in 13.1 (Horizon, Seraphs), but other items/champs need more work