I'd love to see the WordCamp team at Automattic develop more conference management tools and offer them to WordCamp organizers. I know the theming is limited to what you can change via CSS against the Twenty-Fifteen or WordCamp-Base theme, though I think they are working on expanding these capabilities to support more themes.

Things I'd like to see:

- integration with Lanyrd, EventBrite, and 10times conference tools/directories
- integration with live video streaming companies
- push notifications for when a session has been accepted/rejected
- an archive or WordCamps I've attended, submitted to, spoken at, etc. tied to my wordpress.org account
- slide deck repository (also integrate with SlideShare, etc.)
- a virtual swag directory (and maybe offer swag for sale online before and after the event)
- better attendee directories (allow attendees to have robust bios, etc. -- not just gravatars and links to their Twitter, sites, etc.)
- WordCamp mobile app(s) -- I think the Android version is almost ready.
- Inline chat and messaging before, during and after the event.
- Session feedback controls (both anonymous and not; let the presenter choose)
- Session reviews and ratings
- Speaker reviews and ratings