Firebase Analytics: See event data
Firebase is far superior to Google Analytics in many ways, so I would recommend you try to experiment with it a lot to get hold of how it is working and the features it is offering.
First when I send an event, you can add a bundle with data. I added a bundle but where can I see the data I send? Or is this not possible with the free plan?
You are right, you cannot see your raw event data on the Firebase console. It just shows you the Event names, which you can use for creating Funnels (user flows, conversions) as well as different kinds of Audiences.
To see your raw event data, you will have to purchase a plan. If you have got a large user base, you better use the Blaze plan which is pay per use or else take the Flame plan. https://firebase.google.com/pricing/
Once you take a plan, you will be able to see all your Events on a Google BigQuery platform where you can query data easily.
The second thing that I miss is the live view, is there some way to see live what's happening, or is this a feature still coming.
The Events take time to get logged on the Firebase console. In my experience it varied from 2 to 6 hours. For BigQuery, I could see the Event data only after the next day i.e. close to 24 hrs delay.
Hope this helps.
Update for May 2017
You can now see event parameters in the Firebase console (see announcement). Go to Events, click ⋮, Edit parameter reporting. The distribution of event parameters will then be visible in the dashboard for that event. Note that it's unfortunately not retroactive, so you'll have to wait for new events to be logged.
Firebase now has a real-time view called StreamView