Overview
A huge patch is dropping to address some of the early concerns around the set (fights are too long and balancing is off). You can read the full notes here.
As always, be sure to check out our comps page to get access to the best comps to play and the data to support it here.

Systems
Two Power Ups added
Max Speed: Gain 10% AS + permanently gain 1.5% every 3 takedowns
Mana Rush: Start combat with Full Mana (this was already in in the first patch but has just been re-added)
Prismatic Orbs
55 gold: removed
10 gold + Radiant Lucky Item Chest added
Buffs
Traits
Monster Trainer XP stage bonus increased
Ahri's Star Guardian bonus increased
Wraith damage increased at all ranks
Units
2-Cost
Gangplank damage increased; gold chance decreased
Jhin 4th bullet will change targets if target dies mid animation
Xayah damage increased
3-Cost
Senna damage increased
4-Cost
Jinx damage increased
5-Cost
Lee Sin's Executioner and Juggernaut stances both buffed
Seraphine damage increased
Yone damage increased
Nerfs
Traits
Crystal Gambit
More gems per loss but 7 crystal damage amp 30% -> 20%
Mighty Mech (3) HP nerfed
Luchador heal nerfed
Units
1-Cost
Naafiri shield decreased
Syndra damage decreased
2-Cost
Dr. Mundo HP gain decreased
Kobuko nerfed across board
3-Cost
Caitlin damage decreased
Smolder damage decreased
Yasuo Mentor form nerfed
He's realistically only ever played with Mentors, so the compensating damage increase for his base form doesn't mean much
4-Cost
Karma damaged nerfed
Samira damage decreased
Her ability omnivamp was bugged but is now fixed, but she'll still be bad with the damage decrease
Yuumi damage decreased
Notable Item Changes
Blue Buff... buffed
Shojin nerfed
Guinsoo nerfed
Flickerblade nerfed
Manazane changed to make unit cast more slowly
Silvermere Dawn nerfed
Colossal nerfed
Conclusion
Lots of nerfs to big fast-8 comps means re-roll comps should be find more legging
Caitlin + Jayce will still be strong
Senna + Yasuo reroll should be strong
Ashe untouched but Guinsoo + Colossal nerf should tone her down
Should still be a fairly strong comp to force
6 Juggernaut + Ashe may be better again
Do not click Samira
Star Guardian + Jinx carry should be premier
It's already strong and should be even stronger with everything else taking a hit
Ryze + Mentor + Mech could be strong again
Many reroll comps should feel even better
The Crew
Kai'sa
Katarina
Lux + Xin Zhao
Malz + Rammus
Viego + Duelist vertical