Weekly Challenges

I don't play BR/REDSEC/Gauntlet.

Will I get more rerolls each week to replace the BR/REDSEC/Gauntlet Challenges?

Or maybe optional challenges that a player can op into?

The optional challenges can accompany the BR/REDSEC/Gauntlet challenges. The player can choose either the BR/REDSEC/Gauntlet or All Modes challenges.