BioWare said on Tuesday that it’s delaying major features for Anthem, including the limited-time Cataclysm event that was expected in May, as it prioritizes other fixes, like bugs, stability, and “game flow.”

“We set aside time for this work, but the reality is there are more things to fix and improve than we planned for,” BioWare said in an update posted to the game’s subreddit. “While this is the best thing to do for the game, it means some items from the calendar will be delayed.”

The following features planned for the first act of Anthem — the game’s first 90 days — have been delayed:

Mastery System

Guilds

Legendary Missions – Phase II

Weekly Stronghold Challenge

Leaderboards

Some Freeplay Events

Cataclysm

While BioWare hasn’t said much about how the Mastery System will work, guilds and weekly Stronghold challenges were, like Cataclysms, much-needed endgame content. BioWare has described Anthem’s seasonal Cataclysm events as the game’s “most ambitious and challenging content.” They’ll feature “time-limited world events that cause physical manifestations to occur, extreme weather, incursions of dangerous enemies and new mysteries to solve,” according to the developer.

“The Cataclysm is an important addition to the game and it’s currently a big focus for the team,” BioWare said on Reddit. “The Cataclysm will bring new challenges and rewards and pushes the story of Anthem forward. As our work continues, we will share more with you in May.”

BioWare released an update for Anthem on Tuesday, which included quality-of-life improvements and a new Stronghold, Sunken Cell.