I’d also like to able to filter events by tags. If you use the nav bar tag filter, it works only for the agenda view, not for the calendar and maps view.
But that’s really complaining on a high level. I’ve just used the plugin on my site for the first time and its fantastic!
Edit: even better, if you could also negate tags, for instance “show me all events except those tagged ‘panel-discussion’”. And then the question becomes, can you do that with combinations of multiple tags? And could it also work for calendar subscriptions?