Nothing in ve-model solves the principal-agent problem between LDO stakeholders and stETH holders. If anything, it exacebrates them by explicitely embracing short-term vote bribing. It’s got its flaws and benefits, but I don’t think discussion of them in this proposal would be fruitful because it’s completely orthogonal to the main thing here.
Principal-agent problem can be solved by reducing agent’s (in that case LDO holders) power or by increasing principal’s power. Reducing LDO power is a great goal, but unachievable until Ethereum ossifies enough. Hence, if we are to do anything with principal-agent problem at all, we are left with empowering stETH holders in some way.