Hi,
Yes, probably we need to improve driver editor dialog to make it less confusing (specifically in Sampel URL part of it). I'll think about UI cganges.
Cassandra driver is a big deal, indeed. At the moment there is no good UI tools to explore database at all. I myself need cassandra db explorer for my primary job so I'm going to make it soon. Doesn't looks like a very complex task

I'm going to start in November after 2.0 version will become more stable.
Concerning email notifications. Yes, it is a problem. Currently all email notifications are turned off because we use Google smtp server and it immediatelly adds any masssive sender hosts in spambot list. Dunno how to deal with it. Generally I think we need to move to another mail server...
Thanks!