Who decides how and which issues are organized and presented to the voters; and is that influence effectively centralized control?
The algorithm does. Any token holder can submit a proposal and open proposals are displayed in descending order by the amount of deposit paid.
To release the agreed bounty, a quorum of neophyte investors will vote to on whether the pull request submitted by the contracted programmer meets the requirements of the specification we originally approved by a prior vote? We will not depend on any experts to advise us? This will magically all coordinate itself in a decentralized manner without any de facto leaders emerging?
You asked one question, and I answered it. Now you are asking another question, which unfortunately can not be answered in an objective manner because the answer lies not in code but in speculation about future events.