For example, libraries would like to be able to send Account Expiry to a group of patrons and not all the patrons that have account. Overdue notices are an excellent example of how Koha does this per patron category, however, the other notices - this can not be done.
It would also be useful to be able to only send relevant notices i.e. if a user's account is due to expire and they have items on loan. It is causing confusion among our users that they are receiving emails when they haven't borrowed anything. Even if I change the wording of the notice, it is still not good customer service to send unnecessary emails.
It can be limited using the where option in the cronjob or a TT trick, but it would be much nicer if we had a multi-select list of patron categories.