It would be great if the attachments sent as part of a ticket were a placeholder and could be sent as part of the Agent Notification - Ticket assigned to Group & Ticket assigned to Agent notifications rather than individual links. I realise this would increase the server load but maybe an option is to zip all the attachments and only send one file?
The alternative is to have a placeholder which links to a zip of all the attachments (like the Red text I have added below) as presently the Group notification lists each individually attachment and its url

