This has already been discussed and explained at length here.
Chainlink is not a good oracle design, as the company is incentivezed to obfuscates a clear problem, by adding unnecessary layers (aggregators, nodes) that increase the attack surface of any system that integrates with them. With regards to improving the Open Oracle, the path forward is to add more high-liquidity exchange reporters to the current oracle view. This should not be the highest priority action, as it does not address the security issue at hand which can only be resolved by reducing the amount DAI outstanding debt in the system.