The only thing that I think needs to be tweaked is rate of mettle loss in the Southern Front.

I'm fine with mettle gains in BSF being capped relatively low because they want to push people into Zadnor, but given that the game still clearly wants us to do stuff in BSF even after making it through the storyline (with several relic drops and a weekly quest for CLL being tied to the zone), it doesn't feel right that you still lose just as much mettle dying there as rank 25 as you would anywhere else. It's not like the content in BSF is drastically easier compared to Zadnor or anything, either.

Eureka would have potentially had the same issue, but because there XP is only lost if you home point, it mostly avoided that problem.