But surely in Madden08, it was possible to change a primary receiver.
for example, your highlighted receiver is 'S' and others are 'F' ,'W' 'R'. If you want to change your original primary receiver S into F,
you first put the 'G' key in keyboard and then press 'F' .Now the 'F' receiver is indicated in Orange color, and others are just unhighlighted yellow.And QB's vision is more concentrated on the changed primary receiver than others.(madden pc version)
or press R2 then select receiver icons(circle,square,triangle...)
-madden console version.
I think EA NCAA football is similar to Madden football because they are twins made by the same engine and program.
So I just guess it may be possible to change a primary receiver in NCAA,too.