How about when the dialog is opened and input is valid, Shift+Enter would create the folder and reopen the dialog immediately?
We might have even a third button “Create another folder”.
But I have to weight-in the complexity of the UI added. People like that dolphin is lean is term of UI, not too much superficial things, that are rarely used by a few users, but complexity the UI for ALL users.
I mean how often do you REALLY create folders in batch ? Is dolphin the best tool(legitimate?) to accomplish this?