Migrate publishing subsite into root site

Hello everyone,

I'm aware of the publishing site's limitation (links below) - "For site collections that make use of the publishing feature it is not supported to migrate root sites into sub sites or sub sites into root sites". My question is what is the best tool to accomplish this...if it is possible? 

I need to migrate a SharePoint 2013 subsite with around 40 sub-subsite and size about 5 GB to the site collection root.  For example current structure: http://site/na...want to make it http://na. 

1. Tried in the past with MetaLogix's ControlPoint in SP 2007 with no luck also tried Powershell Export-SPWeb. 
2. Anyone used ShareGate for this?
3. Also Seeing Gary's post on this too... http://blog.falchionconsulting.com/index.php/2007/09/convert-a-sub-site-to-a-site-collection. Anyone comments?
4. Currently I'm redirecting users to the subsite from the landing page...what are the other options? URL rewrite from IIS?

Appreciate any feedback. 

http://support2.microsoft.com/kb/968483/en-us

http://blogs.technet.com/b/stefan_gossner/archive/2009/05/27/limitations-of-stsadm-o-export-import-related-to-publishing-sites.aspx

Thanks!

BlueSky2010
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