Recreated the issue looking into it and will report back.

Yes there are a variety of ways to do this, you want to create a document of record which is defined when you create the form in the form model properties you can automatically create a document of record.  You can also add a form submission object on your form and it will give you a link to the doc...

As a forms portal AEM Forms is a great alternative.  I see you're with ANZ.  I'll forward your contact address to the appropriate person and they can send you a trial as appropriate.

Many times there is confusion when referring to AEM Forms, do you mean the form designer or the server product?  If you're referring to the server product there isn't a charge for trials but I likely makes sense to have a conversation first to ensure it's the right fit for your needs

Just for clarity, an XDP can have multiple master pages, it may be that Assembler XDP stitching doesn't support it

Can you please provide the sample XDPs and DDX?

This can be done in 6.1 if you use the AEM Forms JEE workflow.  The user will submit with an external facing AF and upon submission a workflow will be started and the internal folks can use Workspace to run through an approval.

Is this for an internal or external participation?  In AEM Forms 6.3 there were new workflow capabilities that will provide exactly what you're looking for.  https://helpx.adobe.com/aem-forms/6-3/aem-forms-workflow.html

I don't think preview from Designer is the question you're asking.  To render an HTML version of an XDP from your website you have a couple of options, there is a forms portal you can use from your site, another option is to simply point to a URL to render the template.  To get an example of the URL...

You can add multiple applications to a single LCA and deploy the single LCA to the fresh install.  You create an LCA through Workbench and deploy it to the new server with AdminUI.https://helpx.adobe.com/pdf/aem-forms/6-2/WorkbenchHelp.pdfCreate an archive file 1) In the Applications view, right-cli...