I got to B rank with Fei. Decided to switch parameters to fight only stronger opponents than myself. I thought this would help me get better, and as it turns out, I did get better. I did, however, lost like 2500 points and I noticed today that I had leveled down to C+. WTF Capcom??? Does that mean I need to gain 2500 more points to go back to B rank?
Personally, I think this is bullshit.