I really don't have a problem with double shipping for the titles I love. If I don't like a title enough to keep up, I simply drop it. Comics aren't a necessity for me at this stage of my life (I'm 33 years old).
Inconsistent art is a problem that seems to have gone beyond double shipping as even titles that ship monthly suffer from inconsistent art teams (Action Comics 12 had what? 3 different artists?). Apart from Larroca, i don't know any other artist that can consistently put out good work for extended periods of time.
However, I do understand why people complain about the expense factor. That being said, my advice is for people to buy what they want when they can and postpone less urgent purchases until another time.