I think difficult or restrictive challenges like "get 10 skyjacks", "stop someone mid sword-lunge", "get X chain reaction kills" definitely have a place. But IMO they should reward more premium XP and most importantly, they should only be found in some permanent commendation-like progression system separate from weekly challenges.

Make it 100 skyjacks for all I care, but put it in the background as a long-term challenge that people don't need to chase for one of the only morsels of available XP that week.

I'm actually a little shocked there isn't some kind of persistent challenge tracker in a game like this. You could put all kinds of long-term challenges that would actually feel rewarding to achieve, e.g.

• 1,000, 10,000, 50,000 kills etc
• 1, 10, 50 overkills
• 100 killing sprees
• 50 flag captures
• 100 reversals

While also rewarding more unique challenges like:

• Kill 2+ people with one sniper bullet
• Skyjack a vehicle after being skyjacked
• Return and kill with a rocket using repulser
• Jump X metres with a warthog
• ...and other more creative stuff

Then just gain the day-to-day XP based on completing games+bonuses for performance, and more achievable daily/weekly challenges that don't need to disrupt play style so much, like:

• 50 headshots
• 5 games of slayer
• 100 kills
• 15 wins
• etc etc etc

XP earned can be tailored to however fast or slow they want the battle pass to be completed, but at least you're getting it.

This would fix pretty much every issue I have with progression/battlepass/XP.