Warzones are 8v8. Arguments based around 1v1s are moot.
Full 8v8's almost never happen, even in Darkstar and Huttball - put all 8 of your team in one place in any WZ and see how that works out for ya.
1v1's that determine ownership/completion of an objective happen all the time in WZ's.
A single defender that litterally requires more than one attacker to dispatch is a design flaw.