Comment 1 for bug 1221475

I don't think it's confusing and regarding dialogs, most extensions (which have dialogs) don't actually apply changes immediately and they have a preview option. That dialog has a preview area and pretty much all of those controls exist in the text tool controls bar now, so if you want to actually modify the text while experimenting it makes more sense to just use that on-canvas tool (we support two different workflows as it stands).