Hello! This is Vikk from the Hungarian Polkadot DAO, one of the Decentralized Voices (DV) in the current cohort.
The current plutocratic system (1 DOT = 1 vote) embedded in OpenGov unfortunately cannot yet be replaced with another system, as there is no fully functioning alternative, such as quadratic voting. This is mainly because Sybil attacks cannot be effectively mitigated in a fully decentralized manner. (Check this very long, but really interesting discussion about quadratic voting on OpenGov: Quadratic Voting for Polkadot Governance)
I believe the DV Program is currently necessary to increase voter participation and reduce voting apathy—an issue that affects all DAOs, regardless of the blockchain they operate on. The DV Program serves as a great incentive for smaller communities like ours, helping us gain recognition within our local community in Hungary. I can already see the benefits: members of our community are becoming more aware of OpenGov and are starting to consider delegating their votes to us. Slowly but steadily we can gain more voting power from our community members and if W3F undelegate their DOTs, there would left some voting power delegated to our multisig.
From the perspective of an elected DV, the program is valuable—it incentivizes us at the Hungarian Polkadot DAO to increase awareness, expand our outreach, and attract new delegations. Not to mention, I can see that many new DAOs have emerged in the past few months and are actively participating in the decision-making process. I’m guessing this is because they’d like to be elected as a Decentralized Voice in the future.
So, long story short: IMO, the main problem in OpenGov is voting apathy. The DV program aims to increase voting participation. If the program disappears, voting apathy will remain consistent. If you have ideas on how to increase voting participation without the DV program, let us know. 
Looking ahead, I see a possible evolution of the DV Program in which more entities gradually receive smaller portions of voting power from W3F. Over time, this could be the key to fostering a more balanced, inclusive, and fair voting system within Polkadot OpenGov.