While this might be true for the top teams in BB, I believe that in the majority of leagues across the entire BB world, there are many tactics that can compete. And if that's true (and a cursory glance at last year's d.v, d. iv, and d.iii finals series says it is) then I say there is no problem. If the top dogs get bored and move on, well... so long and thanks for all the fish, top dogs. Not that I am advocating for people to leave the game, but online games are a transient thing and keeping the game stable for the majority of users is, in my opinion, more important than catering to a vocal few who have daytraded or small nationed their way to the top.
Once I scored a basket that still makes me laugh.