Hi Federico, thanks for your feedback. When you say 'use short English webhook titles' did you run into an issue with a particular event name? If you can share that with me it would be useful so I can improve the service.
The idea of the second field in the pause step is so that you can use the value of one of your variables. For example if you had a variable named delay, you could put {delay} in that field and it would use the value of your variable for the pause. Perhaps the UI could be improved so it's less confusing - I'll look into that.