Ha! I completely missed that TC and got lost in several older threads that clearly haven’t been tied together. I’ll get onto that!
This TC simply changes the text, rather than hiding the default button and replacing it with a new button. For my use case where I’m also routing to a Wizard from the Custom Wizard Plugin 🧙, this is necessary.
However, I’m impressed by the completeness of Customize new topic button text (settings array, covers other buttons, etc) and on looking at it again I see it is possible to change the route of the new button with a small tweak. It would be better to (slightly) extend that TC instead of having this one.
I’ve put in a Feature for this, including a pull request: