Surely, A big loss for Disney+Hotstar customers!
AFAIK, Disney is a company which considers streaming as the future, I don't think they are going to back off in the streaming race.IMO, they are not at all interested in reaching a particular milestone through subscribers anymore and that's why they are letting go of these rights even after knowing that it's gonna affect their subscribers count..
It was always bound to happen and that's why its better to have their own contents rather than licensed ones. Disney have even increased gap between Marvel shows also.
Finally, Now, I don't think they are gonna let go of BCCI rights.