I wrote these as I was watching, may have missed something but I'm pretty sure this is everything. 
Ash: people are saying the fusions are getting worse
Ciri: we don't think there is such thing as a bad champion
Ash: have you seen Harrier?
1) It is possible that good rare champions will be coming, but the main focus is going to be on epics in order to help newer accounts progress faster.
     See below for exact quote. 
2) More limited edition champions like Ninja - no specifics
3) Tavern will be improved by the start of spring.
4) Ciri just called out Skratch and hellhades lol, basically said same thing Oracle told us about the feast and keg NOT being a part of the promised updates, they are separate. 
5) New filters: Sort by upgradeable, sort by levels, sort by ascension.
6) There will be a button to level/ascend instantly outside of the feast and barrels. Using all of the potions / brews that it would normally take.
7) Next year super raids for doom tower and FW early 2022
8) Next year main focus will be pvp.
9) 
Hydra will have different heads (obviously). Head of Torment deals with fears, said you need veils to not get true feared.
If you manage to kill Head of Torment, you will get cleansed and 2 champs will get perfect veil buff, I assume in preparation for the next head.
Poisons will be weak to it.
That's all they covered about Hydra.