Right now, there are two configurable limits on the attachement control: number of files and the size per file.
I would suggest to add a configurable limit for the total of attached files on the control, regardless how many files are attached.
The user should then be able to configure which limit should be taken into account.
We often use the attachment control together with the Office 365 Outlook Send Mail method. Therefore i want to enforce the message size limit of my company on the attachment control. But still let the User choose if he wants to upload for example 3x5MB (possible today) or if its more convenient for him to upload 10MB +5MB. this flexibility would only be here if i could configure a "global" limit of 15MB for the control itself.