The added complexity is well worth the added control and early access to new widgets, I think.
The Dev edition can take a few more minutes to set up, but when it comes to actually using the thing, it behaves identically to the AGOL version, and gets you earlier access to new widgets (Print widget, anyone?), in case you're stuck at an older version of Portal, where your built-in EB is going to be months behind.
Deployment isn't difficult, either, and gives you the added benefit of retaining prior versions. There's no way to undo things after clicking "Publish" in the standard EB, but with the Dev edition, you can keep and roll back to any prior version you want.
If you have more than one person working on your Experience, you can actually combine EB with a source version control tool like Git to manage and merge concurrent work, too.
- Josh Carlson
Kendall County GIS