If you stop at 3 weekly challenges (assuming they give 5k XP each…)
- Previously you will earn 30k xp total (15k from milestone rewards)
- Now you will earn 35k xp total (20k from milestone rewards)
But if you completed all 5 weekly challenges that give 5k XP each (exclude the 8 progression one)…
- Previously you will earn 50k xp total (25k from milestone rewards)
- Now you will earn 45k xp total (20k from milestone rewards)
Essentially overall you earn less total xp but you earn xp faster.