"Clearly firing Dwayne Murphy is going to turn this club into a dynasty.
Next we can fire Bruce Walton because he isn't turning guys like Hutch into Cy Young winners."
I think most people would agree that coaching can only take a player so far. I think coaches are relevant to the point of establishing an approach, and identifying/rectifying problems. Beyond that, the execution is up to the player.
I think the big difference between Murphy and Walton is that the pitching problems seemed more tied to execution than approach. For example, if I'm not mistaken, Romero's recent control problems were tied to him rushing his delivery. Beyond the coaching staff helping to identify the source of the problem, the onus is now on Romero to fix it.
With the hitting, it seems like the problems are as much to do with approach than anything. I don't have a problem with a player attacking early pitches or working the count, but it seem like they are doing neither. They seem to be taking strikes early on, and swinging at pitches out of the zone later on the count. This is my impression in any event, the number may indicate otherwise.
In short, I don't think all struggles are created equal. The source of the hitting woes seem like they may be more readily fixable with a different approach via a different coach than the pitching.