Lack of built-in flash on OM-D annoying or frustrating?

You only need to attach it when you need it, it's a bit higher than normal built-in flashes, it looks cool, and it allows the body top to have an extra dial or button. When I use a flash, it's usually the FL300R (or even FL600R) so I just keep the small one in its little pouch, which can also hold the plastic covers when it's on the camera. It works great as the wireless trigger.

By the way, if you search you'll probably find about two dozen threads on this same topic last summer, when the camera was finally being delivered.