While I don't live in the area and won't be going to any of these shows, there's nothing on the link you provided that says anything about ticket deals. I just clicked on it out of curiosity since you said the sales were bad for the shows. I wouldn't worry about ticket sales for Cooper or Gigantour being a little low since there is still time before the shows happen. Now, if they were happening this weekend then it would certainly be a bad sign.
3/20 - Dream Theater