Unalienable rights are a good safeguard in any democracy. Certain things can be made exempt from a direct democracy such as a rule that solutions may not target a specific group if its anti discriminatory for example.
Individual free agency sounds good and I lean strongly in that direction to. Done right its basically western liberalism. However the tricky part is what agency to restrict. We all agree serial killing isn't desirable in a society so you'f need some kind of boundary in place if you don't want a free for all.