We use Slack at Post Status, and while I love it, it isn't perfect. I am regularly impressed with their enhancements, updates, and even their changelogs. So I'm happy to see their recently published platform roadmap. It's a quick read.
I especially like the Trello “Ideaboard” concept , which is a list of ideas that could be built into Slack apps. A public Trello board isn't new however: here's a guide to making one if you want to do something for your company.