The goal of the redesign is improved clarity and ease of use.
(Full post from CC blog)
Diane Peters of Creative Commons HQ:
We are pleased to post draft 2 of 4.0 for public discussion. This comes after several months of substantive conversations on a number of policy issues, with input solicited from our global community on the CC license-development list (archive), through affiliate consultations, via comments posted directly on our 4.0 wiki, and submissions to staff.
We fielded comments from an impressive number of jurisdictions — more than 50 by our estimate. The combined input reflects an incredibly diverse set of opinions and an equally diverse group of constituents. Individual creators, educators and educational institutions, governments, policy makers, academics and many others all added their voices to the conversation. We received a great deal of input and revision proposals, and people shared many informed (and sometimes passionate) opinions on a wide range of topics. And while compromise and consensus are not always achievable, we feel the decisions reflected in draft 2 are well grounded and considered. (…)