[Acs] transactional Message: using a collection in a collection

Hi Everyone.

I got a new question this time for the transactionnal message..

My customer need to send some real time message  to his client.

Problem is to be able to have a collection of items in another collection.

According to the documentation (and some test), it is not possible to do it (which by the way seems like a major fallback).

Here's an example (use case)

     we need to actually send some order confirmation

     one email  is send to each final user.

     The email is actually listing the clients orders made in the last hour (plural is important). The order can have multiple shipping address and for each shipping address the product list.

     (hierachy would look like this :

          level 1 : order

               level 2 : shipping address

                    level 3 : product

     )

  Customer is having no problem with his current Classic platform (they got multiple level collections)  but they are migrating to Adobe Campaign Standard

As it's not possible to have embedded collection in ACS, We don't have any way to doS (there are actually more than 10 templates like this)

(and even if we try a solution with a lot of JS, the process will not be user friendly nor maintainable)

Any of you ever face this in ACS  (without major rewriting)?

Thank you