samba - Mar 2013 - Samba 4 DC benefit + filesharing without ACLS

Hi Folks, 

I think about to migrate my smb3 PDC to samba 4 due to the administrative
benefit regarding my win-clients. For file sharing I do not have to use the ACL
at all. My problem is on smb4 the understanding of right management in this
case. If I just put 'nt acl support = no' to my share defs. followed by
chmod -R 777 SHARE It will be fine and or enough?

Further I realized that if a osx (not joined) client connect (common user) to a
share it is possible to delete the 'netlogon' + 'sysvol' per
default !?

I would appreciate a quick explanation about smb4  + file sharing without  ACL
support at all.

Best,
Q