Most manufacturer specs have camber specs that favor negative camber heavily, and do not specify zero. That's because slight
negative camber assists in any kind of turn. Oval track cars run significant positive camber on the inside tire only. Look at one of those cars on a road course, and you'll see both tires are cambered in (negative), instead.
With all the camber I run on my Cobalt - I will be on my
sixth season with my 200 treadwear (extreme performance summer) tires, and there is ZERO excessive wear on the inner portion of the tire. That is specifically the kind of tires that should and will show excessive wear. They do not, because it is not excessive.
Excessive camber will wear the tire, sure, but anything short of 2 degrees is not excessive, at all, by any means.
Here's a great post showing the alignment specs of the Cruzes, including the Gen 1 CTD:
Alignment
Front camber, on the 1st gen CTD: -1.3 to +0.2 is the spec.
That would be a perfect amount of negative camber - and is right in the Cruze's specs.