So the authors suffer if early votes come in for their posts and the curators suffer if they resteem/vote to early, and this idea with the comments will be disasterous.
Scenario 1. Users will comment but not bother voting...which will lead to fewer comments...which will lead to fewer posts... which will lead to the end of Steemit.
Scenario 2. Users will post less due to users having a long 15 minute window to wait to upvote or the author loses out on the vote to the 'pool collective'...Fewer posts mean fewer comments...fewer comments mean...fewer active users... fewer active users means less investment...if investment goes away then Steemit goes away too.
Are there any other scenarios?
I think "the end of Steemit" is overselling it a bit. It will merely be really, really annoying. Then people will realize that it's really, really annoying and Steemit and the witnesses will come up with a better solution and include it in HF21. I just hope we can convince them to skip all that and do it right the first time.
...But if people realize it is really really annoying, and it takes as long as it has between Hard Forks, then...people will abandon Steemit hence my reasoning (perhaps not the end though, just not really popular).BTW thanks so much for your response and upvote.