Not only that, even a 1.5% fee (3.5% for Monero) can be charged without a problem, so even if the fees increase, it won't be a problem, but adequate liquidity must be provided.
If I remember correctly, there was a 5% fee on XMR orders on eXch. And back then, they were the most attractive for XMR swaps.
I would encourage Splash.tf to raise the Monero swap fee, but make sure they always have more XMR liquidity. What has been going on for days, 0.05 XMR is quite insufficient