New weekly quest is boring and draw you attention from other things, such as deeds and challenges.
25 quickplays is a lot. thats minimum of 12 hours of flawlessly winning every map. Thats not a problem on veteran, but I doubt someone have 100% win rate on champ or legend. Please make it either 15, or count all completed missions, not just quickplays.
And make it interesting, make it 3 plays per character, or “slay 4 lords”, or complete act 1/2/3 or repeat this challenge