I would like a DoF as it will lessen the burden on the manager, and will give us a greater chance of continuity if there is a management change. I don’t think in and of itself, a DoF is that imperative in football, and if a club could guarantee a long-term manager, then it doesn’t need one at all. However, with the role of a manager being one of constant change, it makes sense.
That said, it is worth pointing out that directors don’t seem to be staying at clubs longer than managers either. Monchi always seems to be on the move. Others who have operated in similar roles like Milinslat and Ribalta often seem to be moving around too.