there are many people that request the social ranking system, but changing the actual system could be problematic…
The game could display, near the actual player rank, the social rank (1-50) or the BPR rank (1-100). This ranks should be not total, but partial: relative to the courrent playlist (one for team slayer, one for arena ecc).
An example:
Imho this solution can be funny for all players, and make a more professional game…