No, Blizzard had to get it shut down because they're greedy bean counters. They could have spent less money than they spent on legal fees to hire the team and had them produce an even better version, but why do that when you can destroy things and replace them with mediocre slop instead?

You could hire a lawyer straight out of law school. Litigating this would cost almost nothing, it's cut and dried obvious copyright/trademark infringement and turtle wow would be incredibly stupid to fight it. But Blizzard already has a legal team so it cost them literally nothing.