It shouldn't be strange to you, first you have to understand those addresses aren't yours since you don't own the private keys to the wallets and Binance been in control can decide to stop using a particular address for reason that are best known to them. They haven't come out to explain why the decided to change this address but it must be for a good reason. Binance understood what this might do to their reputation if people start losing their coins due to this new developments so they have provided means to help stop that from happening.

There won't be any negative effects, Binance has constantly been informing their customers about the new developments and those that didn't see the information can still retrieve their coins when sent to the old addresses. One positive things about this development is that people will begin to be aware of the wallet address they're using. More cautious will be observe and people won't store addresses outside instead they'll go to their wallets or exchange to get the addresses directly from there.