An option, such as a checkbox, to allow your character not to freeze while using freecam would be great in my opinion.
As of now, while using freecam, your Minecraft character cannot be moved in any way such as falling, getting hit, etc, which is probably intentional.
Although it being intentional, having an option to make it so that your character still works like normal, as in being able to be moved while being in freecam, it would be very beneficial, especially in servers that detect flying, antiknockback, and other weird behaviours.
Hope this could be put into consideration!