If the domestic system gets weakened, the national team will face the same music and it's directly connected to IPL as it's money-making product because you need Indian talents and star value for your product. In recent times, a few capped players started to neglect Ranji, etc for IPL despite being free from the national team. It didn't sit well with the BCCI, hence the recent dictate.
That makes a lot of sense. Thanks for clarifying that. I believe Ishan Kishan was one of them who was neglecting domestic stuff for the IPL.
Bazball is not a bad option in this series for England. The one who used it (Ben Duckett) scored plenty of runs, and managed to put the Indian bowlers under a lot of pressure. On the other hand, those who played defensively, such as Zak Crawley and Ben Stokes didn't managed to get the scoreboard moving. At least against the Indian pacers, Bazball seems to be a good option. Duckett never allowed Mohammed Siraj to settle down (although Siraj came back strongly and cleaned up the lower order in first innings).
Other players like Root etc used the Bazball approach too ineffectively which messed up their original playstyle which is why this approach only suits certain players in specific conditions.