With the new simplified AdSense management, you
don’t have to re-change the code on the pages of your site every time you change ad units. Now when you create an ad unit once, you can change it on the AdSense management page, and all changes on your site will automatically pass, however, in a few minutes.
This innovation greatly simplifies the management of advertising. Especially if you are not particularly friendly with
all these codes and can not remember where they are. This makes experimenting with AdSense easier.
However, the new system has limitations. For example, you will not be able to change the size of the ad unit - to do this, you will have to create a new ad unit. Also in the new system there is no possibility to remove ad units from the management page, but if they are inactive during the week, they will automatically disappear.

If your AdSense management page doesn’t have new features, you’ll have to wait. The fact is that Google is again coming to new features gradually. This is already common practice, which was last observed with the introduction of IMAP in Gmail.
via
Mashable!