I agree with you about the dialogue. It espeically irked me when there are three interesting choices and you end up hearing the same thing no matter which you clicked.
The puzzels, graphics, and story all did work for me though. I digged the gameplay a lot. The controls didn't seem bad at all, although I just slightly prefer pure point and click over moving with the arrow keys at all.
But as for it being released on a monthly schedule, well, that's telltale. It allows them to create the kind of content they do fairly quickly, allowing them to iterate on previous products while providing an efficent way to monetize their products. They are pretty routinely declared to be the sole people out there doing episodic gaming right, on a fairly tight schedule. You can wait five months, which frankly is less time than you would normally have to wait for a full title so soon after it's announcement, or you can enjoy 3-4 hours of quality pirating a month, likely followed a year later by another 5 months of Monkey Island adventures.
Hopefully the will fix the problems they had with the release this time around though, so it won't happen again next month.