I say keep it the same and offer EMS and airmail. For USA at least. My experience with DHL is much the same as Brad Smith with idiot drivers, mishandled packages, and the only times I've even had to pay customs duty is with DHL packages.
got it. you vote for EMS and China airmail and vote against DHL. i am a bit surprised to know your terrible experience with DHL, because i thought they charged much more than EMS and should offer better customer service. it seemed that i was wrong. thank you for your fixing my wrong impression.
EMS +5 points
DHL -2 points
Fedex -1 point
China airmail +5 point