A mobile game was a good idea. But they went about it the wrong way. Warcraft didn't need a tower-defence game. What wow needed was a sister game that would be frequently updated along-side expansions that would tell stories in the current setting and stuff going on in the world they don't time or want to tell in the main game. Whale for your favourite Warcraft characters. Build a team. Go play the new event about what the likes of Thrall and such are up to during the main plot because they're certainly not up to anything in WoW these days.