I just finished reading the newest version of the Dungeon World rules.  I'm loving everything I read, with one exception.  I really liked the highlighted stat mechanic from Apocalypse World and from the earlier versions of DW. 

I was wondering if Sage or Adam could comment on the idea/thought process behind removing that mechanic in the newest version.  I am considering house ruling it back in, but I'm wary of making any changes to the rules without a full understanding.