Guild Wars 2

It would be interesting to watch if the secondary objective grew in importance as the match went on.

For example:
1) Forest of Niflhel – NPC’s killed grant additional points (and additional stat boost) on for each successive time it is spawned. NPC’s would also become more difficult to kill themselves as well.
2) Legacy of Foefire – Guild lord difficult and reward would scale as length of match progresses. Maybe at the start of a match, a player could solo the lord very quickly for 50 points, or at the 20 minute mark, you would need a full team to take the lord down over a minute period for 200 pts
3) Battle of Khylo – Trebuchet does increased dmg as match goes on (to being able to 1-shot medium armor players at 15 minutes)
4) Temple of Silent Storm – mechanics work fine as is for feeling of escalation
5) Spirit Watch – Start orb capture at 10 pts base (20 with control of point). Add 5 pts base each time orb is captured.

You would also need something in the UI to designate the current power level of these mechanics.