Well CoC isn't a boring game, it is infact alot interesting but the problem is the field it was make in... Now i am not complaining STS, but i have talked to many who left CoC in its early stages(BETA) and they said that they are going to work on AL, and CoC is just not their type.
The thing is that STS is always been an mmorpg type of developers, they made 4 games like that and they are very successful with each however when a MOBA game was made by STS, the community didn't preferred it because it was not their type and those who enjoyed it, were less, like too less then AL, so that's why it wasn't focused before because its outcome in the start was poor and in business point of view, it is not worth to work on.