You're very wrong about the colorless mana. Mono-blue has plenty of space for colourless, and with 8 dual lands available at least even a 2cc deck has plenty of time for 4 Desert, especially considering your turn two spells cost 1U not UU these days. Christ these days the better control decks are 3 colours, let alone 2 with a couple of colourless lands. I'm not going to bet the whole farm on it being HUGE but I'm willing to bet the barn and cowshed - even 1 takes care of stuff like Lions, Confidants, Soltari Priests... and it makes the increasingly popular Court Hussar even better to be able to throw that 1pt of damage in on top so it's blocking as a 2/3 effectively.
Greater Gargadon is a very good spell as well, quite probably the best thing a red deck can play on turn 1. I dont think it will stay a crap rare at all, I think it's really strong and it's going to be played a lot for those times your opponent plays Wrath and you sac 3 guys to swing a 9/7 Hasty guy the next turn.