The problem with the new policy is quite simple. There are a million loopholes for tanking. Right now, you must win 41 games. You cannot use SP below 50% for 10 consecutive games and you must check in at least once every 5 days during ST.
These are not tough rules. One can join a world and lose their last 60 to finish 41-121. They would have been 41-61 and out of the playoff hunt. Nothing can be done. One can join a world and keep 1 relief pitcher rested at 100% to start and throw 5 pitches once every 10 games. Nothing can be done. No good world would tolerate that nonsense. But, now, there is no recourse.
Any rule you have regarding vetoes, cash, minor league management, stadiums, prospect money transfer, salary limits, win floors, etc., etc. is out the door. Nothing can be done.