Its always difficult to judge how good a driver in comparison to other drivers.
This is why until a driver goes up, head to head, in the same team, it is difficult to say who is better.
For a fact we know that Alonso and Hamilton are probably equal, with Alonso edging it (more titles, more race wins, finished on equal points with Hamilton in 2007).
We also know for a fact that Button is not as good as Hamilton (Hamilton beat him in 2010 and is doing the same again in 2011).
Now lets move on to Rosberg. When I stated that Rosberg isn't that great, we are comparing Rosberg with the best driver in F1 (currently). We are comparing him against Hamilton, Alonso and probably Vettel.
If I were ranking Rosberg I would put him behind Vettel, Hamilton, Button and Alonso. Possibly No.5, 6 or 7.
MSc should not be compared with "somebody who is doing a fine job". He should be compared with the top drivers in the current era, which does not include Rosberg (93 starts: 0 race wins, 0 pole positions, 0 WDC). I know that some people rate drivers who have 0 race wins highly...but I don't. Plain and simple....that's how I see it.
Keep in mind MSc was a driver of the absolute highest quality. In his heydey he would've beaten with ease, a driver like Rosberg who has not a single race win to his name.
I assure you, MSc did not come back in to F1 to get beat by a driver who has never won an F1 race. He has come back to lead his team...to get the entire Mercedes team to believe in him and to do for Mercedes what he did at Bennetton and Ferrari. He needs the entire team to be working for his cause. He needs to get the team to design the car exclusively for him (and for nobody else). By getting beaten by Rosberg, MSc is not achieving this.
I can only think that perhaps people have forgotten just what MSc achieved. Let me remind you: 91 race wins, 7 WDCs. To put it into context, if Rosberg were to win every single race from here on in, assuming a 17 race season, it would take him about 5 seasons to beat MSc's race tally. THAT is why I am talking about Rosberg in a derogatory way (when comparing him with MSc).
Rosberg and MSc simply shouldn't be mentioned in the same breath.
PS. Notice I've used cold hard facts/stats to back up my opinions. I would like to see somebody make a counter argument, FOR Rosberg, using a better argument than:
I love a good debate so lets hear it