We don't want wikitext pasting in NWE, so to do this I put an unregister call in ve.ce.MWWikitextSurface. However as this code is always loaded if NWE is available this won't work. We probably need a separate registry like we have for commands.
Customize query in gerrit
|mediawiki/extensions/VisualEditor||master||+2 -2||Only unregister WT string handler in WT handler factory|