I personally don't prefer that attitude of working against innovations. Someone has developed a new part for the car and a moment later it will be banned - only a waste of time and resources for a team! They should better try to find some stability in rules.

And about preventing good racing. Well, I have heard complaining about lack of overtakings since the end of turbo-era. That winglet-ban won't chance anything conceptual. The problems, if I can say so, are far deeper. Better ban carbon fibre brake discs.