Merging conversations in tickets

Customers sometimes change the subject in replies which creates a new ticket. We can merge the two, but miss some functionality:

• In the merged ticket there is a private note which can be edited and made public. The ticket is automatically closed with a link to the receiving ticket. Perfect solution.
• In the merge functionality a note is also created in the receiving (open) ticket, also here, note can be edited and set to public/private. This note also includes the customer conversation. Not so ideal.
  

What we really miss is the option to create the notes as in the current solution, but include the conversation in the open ticket, as visible conversation to the customer.
At present the conversation is included in the note. This can be set as public, but that creates an email to the customer, which we don't want.

So the requirement: split note and conversation and enable us to include the conversation of the closed ticket in the open one (as conversation, so visible when to the customer when we reply.

Anyone else with this same requirement?