The issues you've "heard" about may be philosophical and not technical. There is a paradigm shift in the new calendar system from the old (classic) calendar.
The classic had a
submission and approval system for events and resources, patterned after the traditional model of building scheduling in place for many years.
The new LDS.org system, (quoted below from the EXCELLENT
calendar help, as suggested previously by aebrown) initially appears very much different:
allows multiple members to act as editors for the calendar, adding and managing
events.
...When (an editor) schedule(s) an event, you can select a location, such as a meetinghouse, and any rooms or equipment within the location.
Before ANY online calendar, if an organization needed a room, they contacted a building scheduler. However, I won't call this an "approval process," as he/she NEVER approved events, but only checked them against other events, and guidelines set by stake and ward leaders, then recorded the room requested.
An event is deemed appropriate for membership by it's leadership, then, without online calendaring, and now, with online calendaring. Once this is done, a date, time and room (resource) must be selected. The new calendar may streamline this process as it no longer requires the building scheduler to tell you available dates and check for conflicts. I would suggest stake leaders fully understand the shift to the new "distributed scheduling" model in this light, understanding that approvals for events still happen in ward councils, and presidency meetings.
See "Activities: Chapter 13" in Handbook 2.
A search through this forum will bring up many threads about this and other such "philosophical" issues with the calendar so the discussion can continue.
Knowing "how to do so" is simply a matter of going to the help link above for video and reference guides.