Thanks, I'll take a look at this.
The {rrule} string comes from a PHP library and that has its own localisation. I'll have a look and see if we can use XF phrases here instead.
This has been fixed already: https://xenforo.com/community/threads/xf-2-3-regression-clicking-handle-report-on-an-assigned-report-does-not-reveal-the-save-button-making-it-impossible-to-submit-the-form.228470/
I'll check these out for the next update, didn't really get a chance to dig in to them this time around but thanks for letting me know! The unread column in particular actually looks unused but don't think it'd be much work to get that going.
Yeah, I think this can be made a bit smarter. For one, I don't think it needs to check as often as it currently does. I'll look in to it for the next version.
In addition to what Forsaken said; if you create a "simple" task, there's a "User has created a thread in the following forum" condition that you could use.