There is no agreement about what were the good parts of 4E.
Thousand times this.
But see my fear. I have the feeling that most people playtesting are current D&D players which in most cases mean that they like/have endorsed 4E. People who were so turned off by 4E that they switched brands (Pathfinder for example) have a very minor voice in the playtest if at all.
This means 5E will just be an improved 4E which will not attract many people who dislike 4E and will certainly not get them to abandon Pathfinder. For that 5E has to be better than PF instead of 4E with some concessions.