I will be very happy if no-one will play Naval Superiority. I never faced any in games I played and it seems that it is very underused plot. I usually saw some "search" plot or Noble Cause as opener, sometimes Heads on spikes.
I tried Naval superiority in two of my decks as opener and in all games I played it hitted EVERYTIME! Marching orders of my opponents with reserve 4 in one of the games and it was decided in the moment. With good setup it always hurt my opponent more than me and I lost only one game of those I played NS (with Martell Fealty (wanted to try them as standalone faction) against Baratheon Fealty and everyone knows why I lost against them ).
For sure, if I open every game with NS, people will start use Calm of Westeros and I will be backfired by my own plot and I will abandon it for sure. It is not good to use it everytime. But I think it is good to add this plot sometimes to force the opponents to thinking about my plot choices...
And because NS seems to be very rare in these days I think it is not bad idea to use it in your deck. A lot of players can be caught unprepared (and I am dumb when I speak about using the plot )
Please, take this oppinion with reserve - I am not considering myself as something like good player , avarage at best, but the more I use this plot, the more I like it.