It's a legitimate concern actually. The trouble is that the at-large seats don't work now that well either: we just had an election with six candidates for five seats. The large national parties tend to approach these elections in a very considered and conservative manner, and given that it happens to be in their best interest to do so...
I actually don't strongly disagree with that. I myself did some analyses when bgwah once challenged me on that point, and, well, it showed that regional elections were more competitive than at-large ones. But I'm not sure that having regions and districts does anyone any good. One solution might be something like 10 districts, maybe?
Perhaps it could be pointed out that abolishing them and replacing them with districts would actually increase the power of the Regions? It would transform overnight the Governors into some of the most powerful actors in the game, and this, in turn, would increase the prestige of regional politics.
That is true, but one of the reasons why I support the abolition of regions is how very boring their politics are. Maybe they could use more excitement. I'm not sure.