I personnaly have no problems with maindecking Blood Moon is a so-called optimal decklist. The main win condition of Slavery is the opponent's deck. In order to do that, the opponent's deck needs to be strong and to have good "lose" conditions, such as Ambassador, Demonic Consultation, etc ... For that reason, Slavery is a metagame deck, a deck that only has to be played in a highly powered metagame such as GenCon. Slavering an opponent playing Dragon or Keeper is cool, but what would you do if your opponent's hand is "Plains, Plains, Soltari Priest and Savannah Lions"? Nothing really interesting. Hence, as the deck is designed to be played against the top decks, maindecking Blood Moon is not a problem. Back in time, Legend Blue optimal decklist was maindecking 4 Back to Basics. Of course, this weakens your matchups against mono coloured decks, but as I said before, the deck is not meant to face these round after round. If you play in a low powered meta, then putting the Blood Moons in the sideboard for maindeck Masticores, Triskelions, Pentavus or additional Karns can perfectly be done.
I am now completely lost.
You just said how you can't do much interesting. Well, if you've got Blood Moon on the table, and it's working(!!!), then you can't do anything at all. Being that you just told me how it uses your opponents deck to win, then please explain this one to me, because it isn't making sense.
And yes, you can always take it with a grain of sarcasm, but none is intended here. I just happen to think that not only is Blood Moon a SB card that shouldn't be in the main deck, but also that it can actually work against you.
Now as for what I would replace them with? 3 of them would be Cunning Wish. That's what I use in my test build, whith a Chain of Plasma and Chain of Vapor, among other things, in my SB. Both of these cards let me do things with a Mindslaver regardless of how bad my opponents hand is, and 90% of the time I can just win with it right then.
To me that's a hell of a lot better then main decked Blood Moon. Not that 3 aren't in my own SB, or 4 if that's what you want, but it just serves to make the deck itself better rather then hoping to both work against yourself, and maybe screw over an opponent.
And besides, Mono-Blue running B2B isn't a comparison here, because this deck requires skill to play, and Mono-Blue could be polited by a retarded monkey... I take that back. A retarded monkey on valium. Yea... That's better.