With >80% of blocks currently proposed by just two entities (as of February 2025), Ethereum’s decentralization and fairness are at stake. Maximal Extractable Value (MEV) has long been a controversi
2025-03-04 - 4 min read
Overview With >80% of blocks currently proposed by just two entities (as of February 2025), Ethereum’s decentralization and fairness are at stake. Maximal Extractable Value (MEV) has long been a controversial topic in Ethereum. While it provides additional revenue for validators and traders, it also creates an unfair playing field for regular users, leading to frontrunning, sandwich attacks, and inefficient markets. A new proposal published on February 28th, 2025 introduces a radical shift that could completely eliminate MEV and fundamentally alter Ethereum’s consensus mechanism. What would be the implications of this? How would this affect DeFi, staking, and the overall TVL of Ethereum? How would this affect privacy?With this article, ExaGroup explores the key takeaways from the proposal and their impact on the ecosystem. Understanding the Proposal: Decentralized Random Block Selection Currently, Ethereum uses Proposer-Builder Separation (PBS), where validators propose blocks while sophisticated searchers and block builders optimize transaction ordering. However, this structure enables MEV, as searchers exploit inefficiencies in DeFi to extract value from unsuspecting users. The Decentralized Random Block Proposal suggests using a randomized selection process to pick the next block proposer only after the block is created and signed. This prevents proposers from knowing in advance that they will be chosen, removing their ability to optimize block order for MEV extraction. Malik672 explains: All Ethereum clients - not a handful of builders - construct blocks using a cryptographically random algorithm. Validators execute these blocks, achieving consensus via N ≥ 3T + 1 BFT. This eliminates block-level MEV, fully democratizes block proposing across Ethereum’s node network, and aligns with its trustless roots, while remaining compatible with Danksharding’s blob requirements. And if implemented, a Decentralized Mixer would facilitate the following conditions over the current Proposer-Builder Separation (PBS): Random block proposer selection eliminates predictability and prevents validators from inserting MEV strategies Leaving no opportunity for frontrunners or sandwich attackers since no entity can control the transaction order, fair ordering is enforced And it removes economic incentives for MEV searchers using strategies such as arbitrage, liquidation bots, and high-frequency trading Implications on DeFi The elimination of MEV is not just a technical change, it will reshape liquidity incentives and trading dynamics that will ultimately imapct Yields and TVL across top Ethereum protocols. 1. Yields May Drop DeFi users often suffer from MEV-driven inefficiencies. By eliminating MEV, DeFi would become more user-friendly with better price execution and lower slippage. However, this also means: Arbitrageurs and liquidators lose their profits, which may reduce liquidity on some platforms. LPs might see lower returns, as MEV-driven arbitrage volume often increases pool fees. Lower borrowing and lending yields on platforms like Aave and Compound, since MEV-funded liquidators will have fewer incentives to operate. 2. Staking Rewards May Decline Currently, MEV contributes significantly to validator rewards - on top of staking yields, validators extract additional value through block optimization. Removing MEV would also mean: Making staking less attractive unless base rewards are increased Lower yields on LSTs like stETH, rETH, and cbETH possibly impacting DeFi protocols that rely on them. More decentralized stakers emerging, as large validators lose their advantage over solo stakers. This may also encourage Ethereum to adjust staking incentives to keep validators engaged. 3. TVL and Liquidity Redistribution Total Value Locked (TVL) is a key metric for Ethereum’s DeFi health. Removing MEV could have mixed effects on investors’ participation and liquidity distribution. Regular Web3 native users will feel safer trading on-chain, leading to an increase of DeFi adoption Institutions will have a fairer system to bring more institutional liquidity. And capital will migrate MEV-related strategies may move to alternative chains, leading to capital migration 4. Off-Chain and Dark MEV One potential unintended consequence of eliminating MEV on-chain is that it might move off-chain instead: Dark pools and private order flow markets could emerge, where large traders execute orders outside Ethereum’s public mempool. Private relays and P2P MEV markets could replace on-chain MEV, making transparency harder. Implications on Privacy On a privacy level, the randomization of block selection and the elimination of MEV do not fundamentally alter transaction confidentiality but introduce new considerations. Mempool visibility remains unchanged, meaning all validators can still see pending transactions before they are included in a block. The key difference is that validators won’t know in advance when they will propose a block, removing