OT: MLB the Show 10 'Player Potential'

This is more of a rant about something that i have just discovered that is annoying me, that I think will also ignore some of you..

So in MLB the Show every player in the game is given a grade (A, B, C, D or F) for the potential of how they will perform through the next years. This is important as there are alot of features in the game that can easily span over serveral season. Road to the Show allows you to have a 20 years career in the majors, and as you evolve over the years, so does the league, with players getting better, getting worse, and retiring.  Also, Franchise mode allows you to control the MLB club of your choice, as well as its AAA and AA team, over a span of several seasons. Players evolve here aswell, again based on their 'Player Potential' grade that was given to them by the game creators. 

Now for the first time, I have been going through and looking at these grades as I am about to start a Road to the Show player, and I wanted to see if everything made sense, for how someone with common sense would predict players to evolve, from as soon as 2011 and beyond.

Well looking through the Giants, I instantly disagreed with most grades given out. 

Cain was given a C, apparently set to drop in performance dramatically

Zito given a B, apparently set to be better then Cain in a few years

Wilson given a C

Pablo given a B

Posey was given an A, which was one of the few in the game I agree with

J.Sanchez a D

Runzler an F(!)

Bowker a D

Bengie a B

And Lincecum a B

It kind of annoys me that the best pitcher in the game, who is quite young, is graded to drop off as soon as this year, while he has given zero reason for one to think so. Also, to compare to other players throughout the league, and how the games creators feel their performances will improve or decrease as the years go on..  Jorge Posada A, Mariano River A, Omar Vizquel A(!), Hideki Matsui A, Josh Beckett A, Alfonso Soriano A(only getting better, am i right), Ichiro A,

(Also, Ryan Zimmerman D, Felix Hernandez C, Ian Kinsler D, David Wright F, Evan Longoria C)

How is it possible that Ichiro, is predictted to remain consistently a star into his 40, and Tim and Cain are not, into their late 20's? This annoys me because their grade is unalterable. So when I wish to play then game, in a few seasons time, every time, Tim has an ERA of 4. While Soriano, WHO SUCKS NOW, is doing fine.