It's nice that they reduced the fees but they should reduce it by 90% since the mem pool at the moment is completely empty.
I also agree with you most of the trading platform still have high withdrawals fees despite the fact that they are not even putting all of those Bitcoin in actual withdrawal transactions.
Tx fee has dropped sharply in last few months so there is no point for those platform to take higher fees from their users to just process withdrawals. They should be earning enough from trading fees they have...
Exchanges should think about it too, it's good that binance already made a move since the price of btc from December almost lowered by 50%, Binance knows what their customer hoping for. It will attract more traders to do more trading on their exchange.