Overview
We are quickly approaching the end of Set 15, which means you've got to start putting the pedal to the metal to reach your desired rank. You can read the full notes here. These are the big things to note in this patch:
Ao Shin's Ascent will no longer be playable as Dragonlands: Uncharted Realms (Set 7) will return as an alternate mode with some modern upgrades -- if you missed Daeja, Sohm, or any of the dragons, here's your chance to relive those days!
The balance is focused on strengthening middle tiers of traits so that splashing in traits or dropping from the max tier will be stronger.
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.

Buffs
Traits
Sorcerer (4) +5 AP
Soul Fighter (4) and (6) AD and AP buffed
Sniper (3) and (4) damage amp increased
Wraith (4) damage increased
Units
1-Cost
Gnar range 4-> 5
3-Cost
Rammus
Shield increased
HP per taunted enemy increased
Udyr healing increased for base and mentor
4-Cost
Ashe mana cost decreased
Karma ability damage increased
Leona shield increased
Poppy base shield increased
Volibear base AD increased
Yuumi ability damage increased
5-Cost
Varus arrow damage increased
Yone ability damage increased
Nerfs
Traits
Crystal Gambit (5) cash outs nerfed
Strategist shield decreased at (3) (4) and (5)
Units
2-Cost
Dr. Mundo ability no longer cleanses debuff and CC
Kobuko
Mana cost increased
Secondary damage decreased
3-Cost
Kog'Maw on-hit damage decreased
Malzahar
Fixed some bugs that made him stronger than appeared
Can no longer be offered Mage Power Up
Yasuo spell damage decreased
Notable Item Changes
Guinsoo's Rageblade AS increased from 6% to 7%
Kraken stacks faster
Sniper's Focus range decreaed from 2 -> 1
Notable Augment Changes
Zac hero augment buffed
Notable Power Up Changes
Best Defense nerfed
Unstoppable nerfed (again)
Conclusion
If the goal is to increase comp diversity by having people angle more towards lesser tiers of traits, then that is probably not going to happen this patch. The buffs to the (4) pieces and other mid tier traits are just not enough.
Yuumi + Prodigies should see a big spike in play and success with buffs to both her and Leona.
Ashe + Udyr could finally be playable again.
Gnar into Volibear-centric comps could be on the rise with buffs to both of these units.