What I absolutely hate is that when you're going to the preview you are "welcomed" by a dialog that can't be clicked away. Instead you have to navigate through it and at the end, you are pushed to try to create and share a page about you by clicking button "Create a page".
How come you have to try this?! Most users don't even want to be bothered by new functionalities, let alone be bothered by more useless dialogs. And the worst part of all is that everyone has to try it once they're at the preview. But, why? 95% of the users doesn't want to or cares about creating pages. Also, most people don't want to share things about them, because well, why would they? Time is better spent. There's actual work to be done for everyone.
At the risk of sounding rude, but this has to be said anyhow; why don't you take this time and invest it in ideas from the feedback portal? That's where it is for, no? I've looked at the first 10 pages and no one is asking for this. It's not that the SharePoint start cannot be improved, it absolutely can and maybe this can turn out in an improvement, but there are certainly far more important, actual functional matters that could be improved.
BellePodeanu