Scott, you hit the nail on the head. It is the traditional bait and switch. At the planning meeting the talk is big, and the promises are wild, yet without much substance or answers of how the promised ideas can be accomplished.
Ideas I have used is to get a group of individuals to each take a piece of the proposal and address the inconsistencies or question the proposals. Not one person talking but a chorus of citizens. In one case we lined up 20 individuals each with a specific piece of the proposal. Each was allotted 5 minutes. The developer was allotted 20 minutes. He complained about the amount of time the "citizens group" took. Wanted "equal time to address the many issues raised". Rules allowed 10 minutes of rebuttal. Opps.
Another idea. Find a snail darter or Alameda frog that needs to be protected. Or at least researched. Delay is the developers worse nightmare. Funding is limited and delay attacks funding.
At the least get your friend together and walk, camp out and or engage the Political decision makers. There is a reason so many voters are using the marina and the suppliers there. Historical reasons. Maybe not all but some of the history deserves to be protected. They built a "Jack London" cabin down by the marinas on the Oakland side. Let the politicians know that a compromise that, at the least, includes some of your groups needs makes sense if they want to get reelected.