You can find the updated Meta Snapshot here. With the 2nd expansion released, the meta has shifted somehow, though not as much as could have been expected. A few new decks are making an appearance, though none of them are particularly meta-defining, and the usual suspects can be found at the top, with some Runner-ups and Dark Horses trading places. Detailed Changelog can be found below.

Changelog

New Entries

- Soraka/Tahm Kench Heal, the new combination coming from Bilgewater and Targon is added to Dark Horses.

- Midrange Dragons, roaring its way to the Dark Horses category.

- Vimerdinger, the newly revitalized Heimerdinger archetype, added to Runner-ups, with a video deck tech.

Rank Shuffling & Altered Lists

- Lux/Aurelion Sol is demoted from Frontrunners to Dark Horses due to a drop in popularity and generally tough match-ups

- Midrange Pirates demoted to Runner-Ups

- MF/Scouts joining the Frontrunners once again

-  Karma/Ezreal removed following Ezreal nerfs.

- Twisted Ezreal goes down to Honourable Mentions following the nerfs to both himself and Yordle Grifter.

- Discard Aggro promoted to Runner-Ups 

- Elites, following drop in popularity and overall effectiveness in the current metagame, drops to Dark Horses.

- Spooky Swain and Lulu Emoosive removed due to lack of popularity and being overlapping variants of better existing archetypes.