Your one more leaque game per week would crash the howl training concept of BB.
let me think this through:
aktually you have 22 leaque games each season, with the all star week that will be 12 training weeks + Playoff/Playdowns 14 Weeks of training each season.
A 18y pick will have untill end of 29 -> 12 years of training, each 14 weeks, means 168 weeks of training.
Now you will add a third leaque game each week, means season will shorten to 8 weeks, will Playoff and Playdowns, lets say 10 weeks. the guys will get older after each season, so the 12 years remain, means you reduce the over all training from 168 weeks untill end of 29 to only 120 weeks. Thats nearly 1/3 less. That changes the amount of skills at high end players dramatically and makes HoF or higher potential uselss.
I think your idea is not thought out or needs a lot more changes in the game engine than just a third game each week.