Do you mean that a comment like "Great Post!" should automatically have the same weight like an entire 500 words blog post? I don't agree with that for in this case I think very obvious reason. My apologies if I misunderstood your point.
There have been some circumstances where i have written replies that were longer than the original post I was replying to. An OP can be short or long. A comment can be short or long. There's really no difference between them.
I don't have the stats but I believe the majority of voting is currently done automated via bots. If that assumption is correct than I don't see a benefit in this proposal since all the bot users have to do is change the voting timer down from 30 minutes to the 1st minute. So it would all remain the same. In my opinion the timer logic should be removed all together.
It was added to prevent bots from dominating the curation reward pool. Curation rewards are heavily weighted toward early voters. If there were no reverse auction, bots would just be able to vote on everything as soon as it was posted and get a significant portion of curaiton rewards.