Kucoin and FTX have good features you can use both exchanges according to your requirements, Kucoin has supported almost all pairs and deposit withdrawals for many chains and trade without KCY and fast withdrawal as compared to FTX have required KYC for withdrawals and low fees for ETH and some networks no fees but not supported many networks.
I have used FTC a year ago but never checked the conditions to withdraw ETH or altcoins. How do they calculate the fees, does the withdrawal fee depend on the overall trading volume? Regarding Kucoin, it has been proven crypto exchange and more trustworthy compared to Hotbit or small crypto exchanges that can run away with your money anytime.