I use a spreadsheet to break down average form by position. Does your DC have an average form of 8 at LDC, but only 7 at CDC and RDC? Wish the game did this for you.
Do you actually see a difference in results? In my experience, as long as the player usually gets a 7 or better he won't negatively affect the result. However, I do have a DMC/DMR who only seems to play well in MR... wth.