You can just drag images into the message as you compose it.
I have a patch for this. I will ask the QGroundControl guys to pull it in when I can test it some more.
Yes, there are some tools available to analyze logs, I only have experience using MAVExplorer and Mission Planner. QGC will let you 'replay' a log, but it's not really useful for analyzing or post-processing flight data.
There has been a recent change in parameter names in the autopilot code that QGC has not caught up with yet. The RC_ parameters in the autopilot firmware that QGC wants to configure in the camera tab no longer exist on the autopilot if you are using the latest development branch of the autopilot firmware.