On the eXch website it is showing 5% on the dynamic rate fee and 5.5% on the flat rate fee. When taking in to consideration there are several options to swap, you are right the fees are certainly very expensive when comparing them. If Bisq fees are circulating around 1.48% then any competitor should really be very close to that mark unless they have exceptional reputation that drives their higher fees. Maybe eXch will revise the fees in the near future to stay within range of alternative options.