Maybe I'm old school already 22 years of age, but I think the pace should stay how it has always been traditionally, at least for the games and league schedule. We already have 4 games a week if you have supporter. Something is also always happening/updating in BB except Sunday and Wednesday:
Monday: Finance update and scouting points for draft (and U21 NT and NT games)
Tuesday: GAME
Wednesday: B3 Games
Thursday: GAME (Cup or scrimmage)
Friday: GAME (Private league)
Saturday: GAME
Sunday: I use this day to help plan strategies and tactics for U21 NT and I look at my plan for the upcoming week.
This game is perfect for me and many others because you don't have to be on it 6+ hours a day or anything to succeed. Many of the users have jobs and families and busy lives outside of BB. For this reason I will play devil's advocate and say that increasing the amount of games a week would disinterest me and cause problems. I'm not even sure when they would fit in another game day due to the schedule I showed above. Sunday would be the only option.
As for training, they have increased training speed slightly with the secondary staff and training courts and such. So they have already kind of taken this suggestion.
PR helps increase your merchandise and can positively affect attendance turnout and pricing. Not only this but it can help give you a stronger home game advantage or reduce the opponents home game advantage. Why get rid of it? Just because you don't quite understand how it works?
As for your ID/SB suggestion I don't have a strong opinion either way.
Murray/Harris/MPJ/Grant/Jokic - 2020 NBA Champs