Still watching/waiting for the ELO based league. Was the #1 requested feature before BB2 was announced.
In what universe? There was no major call for that.. and any time someone asked about it we pointed out that ELO was a poor method for matchmaking as teams tended not to last long enough to establish a reliable score. OCC had kept ELO data in BB1 and the ELO differences didn't do a better job of predicting who would win a given match than even comparing FF values.
Unless someone wants to do a manually-calculated ELO league I suspect you'll be waiting until BB14 for that.