After looking over a few of the rules in the PDFs for the next edition of D&D I didn't see anything about concealment ( as in miss chance percentage ) similar to D&D 3.5e or D&D 4e.
Has Concealment been completely axed in the newest iteration or does it still exist in some form?
I also don't completely understand the Heavily obscured line. If it confers an advantage to attack you and a disadvantage on your personal attacks, wouldn't someone else in the same area also be blinded and also confer a disadvantage on their attacks as well?