In what sense?

If you mean it doesn't have every single capability of modeling like the
IDF or Text editor would, yes. But nothing does. It's hard to keep up
with the E+ developer cycle ;-)

If you mean it doesn't run off Energyplus 3.0. It does.

I don't use it because it's too expensive. I prefer OpenStudio and the
IDF Editor/Textpad because you have access to all the capabilities that
E+ has to offer, but it took me years to become even semi comfortable
(read: confident) with modeling through a txt file.

Either way maybe this should be moved over to BLDG-SIM.

Alan Jackson, LEED AP