Certainly, these changes in information security will have a huge impact on the users. I believe those who don't want their information be submitted to the authority will avoid using telegram.
Many had been using telegram for fraud and scam purposes, I have seen a lot an been a victim of the scheme where they invited people to do certain tasks in reward for cyptocurrency but get unpaid in the end.
Technology is still too centralized. We will never have our freedom until it is decentralized enough.
Telegram CEO never made any choices because he never had any choices.
Effectively fighting scams should not require you to lose your freedom and anonymity.
It is to be expected, people who wanted to profit from their creation will automatically resort to centralized system. Only a few individual have passion to share their technology without profit for user's convinience.