I'll will gladly try out 7.10 agent 
-). I have several test machines I've been using. The spam was a know bug and is over on Git as well as some of the post here. For a first widely public roll out it wasn't bad. The changes between the two version isn't drastic but it's better. You can see my other rather long post Endpoint 7.9 "Degraded and dashboards" over here.
The agent it's self still needs some work and the elastic-endpoint well that needs a lot of work still. But you've already gone a full minor version change in a very short time. Now only if Microsoft could fix bugs that fast...