If you're using the pill for contraceptive purposes, then you shouldn't skip for 2 weeks because you will not be protected.
As to the taking off 2 weeks for losing weight or getting rid of the bloated feeling, it's not enough time to make a difference. It takes a while, a pretty long time, to get the hormones regulated in your body to start feeling better after quitting the pill. If you're only quit for 2 weeks, you're still going to feel pretty lousy, in fact you might feel worse because you might start getting some additional withdrawal symptoms.
They claim that Yasmin and Yaz are supposed to help with water weight gain, and allegedly it's supposed to get rid of the bloated feeling. Both pills have a diuretic in them that is supposed to help with that problem. But then the problem becomes, after you try to quit the Yasmin or Yaz, your body will be so accustomed to having that diuretic componant all the time that you'll probably have worse withdrawals when you eventually do quit the pill for real.
Anyway, I don't advise you taking 2 weeks. There is really no reason for it, it's not going to help your problem, and in fact it will probably cause more. You might as well just finish out this pack and start your new one when you would have started your next pack of Loestrin.