I went through and counted every mention of hard yes and hard no. You can do the same but in the end it was about 65% hard yes, with about a further 10% "Open only if they do xyz (mainly move modules to tech brokers).You will have to present some evidence that it was in favour, I would disagree and say it was for the most part against, but then we are all subject to confirmation bias and tend to ignore ideas and posts that disagree with our preconceived ideas, this is why when you make a statement like this it must be backed up evidence, not should, must, otherwised it can be dismissed.
What is presented without evidence can be dismissed without evidence.
Here is the link, you can do it too https://forums.frontier.co.uk/threads/powerplay-proposal.426940/
And here is that Obsidian Ant Poll:
As you can see, even when the question is split into three (rather than a binary choice) Open only wins. If you add both weighted merits and open only (i.e. people feel the status quo is not good enough) 75% want Powerplay rules altered.