Logic Pro has some of the most powerful synths out of any DAW out there. And, not only are they powerful, they sound amazing as well. Let's keep one thing in mind, though: They are highly complex! How many patches have you made of your own, for example? Can you remember the last time? Ever?
The ES2 has actually come to be my favorite out of all of them. It just has that sound that adds polish and punch to every track I do. It works amazingly as a bass, a pad, an arpeggiated part... I can go on, and on.
However, when you start trying to create a patch with a default ES2, even if you're very, very versed in synthesis, it can be a daunting task. It's just how the Logic boys over at Apple roll! They give you software synthesizers that will stand the test of time. And that's no overstatement.