iCal

Integration with Microsoft Exchange/Outlook calendars

Staying in sync with third party calendars

Ability to easily re-sync / reset events with third party calendars

Populating locations of events can be harder sometimes

Location of event may also not be in the correct place (down the street one direction or another from actual location)

Populating via another software can be tricky as well

I would love it to have more visualizations and not just the classic one in a common calendar and that it could be customized

You have the possibility to have a face-to-face call by sharing a link that, in my opinion, could be improved by creating groups of only contacts and limiting access to the meeting.

time delay of viewing new events when others add events (family sharing)

user interface

more personalization

communication with outlook and Google Calendar

no video integration with zoom