I watch more on Voom than on most of the other HD channels, especially the ones that aren't carrying any HD anyway. If Dish would drop Voom, there would be no reason to stay with Dish.
What would you have them replace Voom with? The only thing I'd care to see, other than a full set of locals (which may or may not be coming from D*), is SciFi HD, and even on that I'd watch about 3 shows a week, which puts them at or below the worth of Voom.
Now the guide issue, that's a problem. If it were my company, everyone even tangentially involved in it (because by ignoring the problem, they're part of the problem) would be fired, and their replacements would be informed of the reason why. But as everyone knows from their customer service department, Dish doesn't care about gross incompetence.