I am a PvP legend.
D2 had a poor PvP system, it was present yes, but it was unbalanced and didn't really promote PvP. I wouldn;t call it a PvP sysytem.
4v4 Arena combat is a good start, but nearly every online game in the past 10 years allows for competitive play. The reason is because, people like to PvP. Everyone will be a mix of varying amounts of PvE and PvP, but the majority like to compete. It's human nature.
announcing a 4v4 arena and completely ignoring PvP after that point in my opinion is a huge mistake. What do they lose by offering a more dynamic system to satisfy the PvPers? I am really baffled.