Is there any means to design different ads other than on ad-group level? And if not: Would you start a separate campaign and define 400 different adgroups? Is that still manageable or would I have to define all 400 adds "by hand"?
Nevertheless I prefer as much control as possible via my own scripts. The editor offers the possibility to import CSV-data and it would be nice if I could define distinct headlines for each keyword that way. But maybe this is part of the "features you'd like to see-" thread already;)
beautiful widget
beautiful widgets
require a different adjective in some languages and if I target different widgets with exact match or phrase much, I think this way won't work.