Well.. I'm one of those 'thousands' of DE developers AmigaInc keep on bragging about.. and like the most of us have long time ago realized it's not worth the effort.
Idea of DE was not all bad, but they goofed it really badly in practice. IF those players had been pre-installed on common systems it might have work and If they would have made more sensible deal for software disrtribution. Not to mention the fact that each release of Devkit (I have seen) is incompatible with all others (both binary & source level) it was not good sign.