It's kind of a genius move, albeit with inherent flaws. Superman is an extremely versatile character who just isn't as popular in certain times with certain demographics. So, hire people who are in that demographic or work for that demographic to aim at it.
So you get a Superman with Batman's deco seasoning. An extremely weak (weaker than the Fleischer version?) Superman who can be used to sell merchandise, tell a wider variety of stories, and team up with others in a way that ironically doesn't lowball him. That last part was crucial for a bridge to JL/JLU. Streamlined versions of supporting cast and story arcs... the fact that they did Dark Side (as Legacy) relatively new was a cool opportunity, for one thing.
Tim Daly is a hard voice to get out of my head, Clancy Brown is downright irreplaceable