Disagree, and I'll quote you to explain why:
Then, after some time when system reaches some balance, check if your desired proposals are on top, and unvote return proposal until your all or most of your besties are above it [emphasis added]
This can't be done when the only choice possible on a huge account is 100% or 0%.
For the system to work properly people have to be able to vote not just yes or no but also on the specific ordering of proposals, and people with large accounts can't currently do that (other than by splitting their accounts, which is generally undesirable).
Can't be done precisely. True.
I'm not saying that it wouldn't be more convenient but it adds a lot of complexity (vs current implementation) to add precision to individual preferences, but those shouldn't matter much because (well, if) more big accounts will be voting?
It is possible but seems a little bit like wishful thinking.
I mean, to make a very specific and personal case here, there is only 1.3 million SP votes between the documentation for developers proposal and the closed source web site proposal. I'm very much in favor of one and very much not in favor of the other. Right now it isn't an issue because return is much higher than both, but it could very easily turn into a situation where unless I split my accounts (which by the way I am in the process of doing), I have to support both or neither, which is not at all what I want.