Arena has been receiving a lot of praise from everyone in the LoL community, primarily because of its refreshing gameplay and mechanics.
Tier List, 2v2v2v2 Arena Compositions, and why this is the best game mode ever added : r/leagueoflegends
Best LoL Arena team comps
Useful & informative news about League of Legends
League of Legends' new Arena mode emphasizes bite-sized action
LoL Arena developers hint at bright future for new popular game mode - Dot Esports
League devs confirm Arena mode isn't going away forever - Dexerto
LoL Arena champion tier list: Best champs for 2v2v2v2 mode - Dot Esports
When does Arena Mode return in League of Legends? Dates, changes, more - Dexerto
Arena Game Mode REVIEW - What Does RIOT Need To Change?
Arena: Making a New Mode - Behind the Scenes
Best Augments in LoL's new Arena game mode - Dot Esports
Why Arena should join League as a Permanent Game Mode : r/leagueoflegends