When I was evaluating Events Booking, I also checked out JEvents. Events Booking won hands down because of the Locations implementation, but the one thing I really miss from testing in JEvents was the ability to create specific 'calendars' for grouping events, and you could create a specific calendar for an RSS feed subscription to an external calendar.
The local municipality has a lot of meetings that our members would like to stay informed about and they offer a calendar display RSS. I would like our members and other parties to be able to see those events on the calendar display.
So two wish list items:
1 - Specific calendars (we can sort of do this with categories)
2 - The ability to view someone else's RSS calendar feed as a "calendar" (could just be a calendar category, I am fine with that)