I think you woulda struggled to actually trade. It has a habit of becoming unusable in the epic moments.
This is true, although I did hear quite a few reports that trading was not too bad on the API -- that it was those using the web interface that really suffered. Knowing Bitfinex for the last couple years, I never use my margin trading account during these lag times, never hit the order button more than once. I placed one limit order in the $160s and one limit order in the $180s when we broke below $200 and they both executed, but I knew damn well that they may not have.