Yes. The Body Corporate should be given the opportunity to function with a full complement of members.
It may be that the AGM cannot attract sufficient members to fill all of the positions but at least there would have been an attempt made to do so.
In my Body Corp the period of time between calls for Nominations to the committee and between the AGM itself is often 4 months.
New Lot Owners may have joined the membership of the Body Corporate between the time when the nominations were called and from when the AGM was held.
Nominations from the floor of the meeting allows new owners to nominate or be nominated. Existing Lot Owners may have changed their mind and may now want to join the Committee.
The number of committee members a body corporate has for the whole year is determined at each annual general meeting. Throughout the year, the body corporate cannot increase or decrease its numbers on the committee. For example, if 6 people were elected to the committee at the last annual general meeting the body corporate must ensure it keeps 6 members for the whole year.
Therefore, if a position becomes vacant throughout the course of the year then it must be filled.