No it's understandable, if you've played the deck style before then you know the work that goes into it. But if you look at these pasts posts, the original poster has yet to respond yet. If he/she has any ideas or wants to CONSIDER our suggestions then it's entirely up to them. Me personally I never play mono colored decks unless I'm:
a) teaching someone else how to play
b) Running a tribal theme that I like (such as Mono-B demons or Mono-White angels)
c) have a large inventory of cards that I don't want to go to waste
or d) just wanting to try something new.
My mil decks ALWAYS run more than 1 color (usually in the U/B Dimir style but that's just me).