How many exchanges you know of that have too high withdrawal fee? I was shocked that Dcoin exchange wants 0.001 for any bitcoin withdrawal you want to make while other exchanges charges only 5000 Satoshi for bitcoin withdrawal, I was forces to exchange my bitcoin for litecoin before getting my coins out
if the situation is like that, you need to exchange the bitcoins you have with other altcoins that have smaller fees, like ethereum. I sometimes use altcoin to reduce fees.
for bitcoin fees in some exchangers is quite large, even as far as I know there are some exchangers who even get up to 0.002 BTC. however, you need to find other ways to reduce it.