Well, I play it, but here are the reasons it's sort of.... crap.
1) With each update the engine gets worse
2) Game wasn't ready for OB yet if you consider the amount of bugs, glitches and exploits.
3) Attack delay, even with 10-20ms.
4) High levels that have already caught a ancient dragon, just spawn themselfs at the locations it usually fly's to keep killing it, so they're the only ones with a ancient.
5) Rabbit dragons....