Patch 1.50 is still being tested. But I did find out about another feature that has been added. The ability to assign which item (pistol, grenades, etc...) you want to assign as the quick swap is going to be included in the 1.50 update. Pressing the quick swap button will swap between the primary weapon and the assigned item. The selection only needs to be assigned once per game and will persist for all rounds in the game. You can change quick swap assignment at any time from the in-game weapon selection menu (weapon wheel). It will default to the pistol until you change it.
Quality Assurance is working hard to get the patch ready for you and the team is looking forward to getting you the DLC as soon as possible. We thank you for your patience as the work continues to support this title.