Hi Pesi

All inputs can be duplicated in 3 clicks max:
1 click on input gear icon
2 go first tab called General (if not already on it)
3 click create virtual input

You can create several duplicates in advance if you think you might need them

BTW regarding titles, if you can use duplicates (same xaml), I guess you should also consider using the "title preset" feature which allow to enter different values as a list of titles that you can then select with a single right-click.
Also you can use simple CSV files or data source to ingest values in your titles which is very quick.

Besides the web controller also allows to add titles on the fly...

http://www.vmix.com/help18/Title.html

If it's the same xaml title, you don't need to duplicate them, use "presets" instead

That's exactly what I'm talking about

Once you have a lowerthird title for talents you can use the same for 1000 people if you need and select the right one with a single right click... Check carefully the doc and experiment... Use the + icon in title editor to add a name... You'll see how simple and powerful it is...