Martin - I think I understand what you're asking, and, yes, I would play that course. The 2nd dullest man in the world might be less dull than the world's dullest man precisely because he is aware of his own dull-ness (a self-awareness that the dullest man in the world surely lacks), and in this realization he would be driven to overcome his own dull-ness and strive for something exciting and interesting. Now, this striving can go either way, and normally it goes not for the better -- i.e. the resulting course is over thought and overly detailed. Ah, but remember, we are dealing with an essentially dull man, a dullard, and so even when he's trying to be interesting and exciting, everything he does comes off as slightly muted and understated. So, who knows -- he just might design something like Garden City or Common Ground!!!
Peter