Seems classes can't be balanced or fair and the wf's can't be balanced... so it's obvious

1 - class warfare... play only against your own class. Option when enough number to opt into this. Maybe a different warfront layout to suit the particular class along with unique class power ups. Also has unique achievements and rewards etc

2 - Last man standing... variation of class warfare but a nice cache awaiting the last man standing or the one with the highest objective count after a predetermined amount of time. Again unique power ups, titles and incentives to win and not throw matches or do anything but your best.