Right now we are working on improving performance as that is the number issue for the next release we are looking to add new features again starting after that.
I would recommend going to our UserVoice Page and making that as a feature option as that is where we get the bulk of new features from.
http://tribe.uservoice.com/
As for the bulk delete you can give those placeholder events a “coming soon” category to make them easier to find and remove.
That you can select all and easily delete 100 or more events in a minute.
Thanks