According to Evgeny Gaevoy, the real issue in crypto derivatives is not perpetual futures design but centralized and quasi decentralized exchanges that act as prime broker, central limit order book and custodian in a single venue, which drives the core market structure risk for traders, source: Evgeny Gaevoy. Gaevoy adds that traditional finance solved these structural problems long ago and argues attention should shift from tweaking perp design to fixing the exchange role combination, source: Evgeny Gaevoy.