I have an exciting update for you - we had a brain wave on how to implement this (which was much easier than originally thought) and have today released a beta version of this feature!
This is still a complex feature and so don’t be too surprised if there are some teething issues with custom templates, but you should now have the tools needed to make these labels look however you like (and can quickly swap back to the default template if needed). 
If you go to Settings → Label settings → Custom stock label templates, then you should be able to make your own label template. Having made a template, you can choose which container types should use this template.
I’d suggest you assign your custom template to a single container type first and make sure to test it out. The easiest way to test your template is to use a “Planned packaging” on a batch (for the right container type) and generate some labels. If you have any troubles, you can always keep your template and unassign it from any container types, so that you can keep working on the template without “breaking” any labels that you need to print.
Please give this a try and let us know how you get on and any feedback that you have 