I don't mind alternate reality episodes nor time-travel ones that end in a reset if there is a consequence
of some kind. The signal that the ZPM-hive received in the finale... it could have just as easily been Earth's coordinates acquired by some other means. The finale wasn't dependent on "Vegas," we get some forgettable dialogue, and that's it. Now, "Vegas" would have been far more interesting if one or more of our
characters had crossed over to the alternate reality. Alternatively, if there'd been more
than some spatial coordinates accidentally transmitted from an alternate reality. The consequence
was just too weak. I'm only interested in alternate reality/timeline episodes that have a consequence. "Before I Sleep," "McKay and Mrs. Miller," "The Last Man," and "The Daedalus Variations" all had a direct impact on the main characters. Nothing that happened in "Vegas" impacted anyone. Like I said, Earth's coordinates could have come from somewhere else, and the result would have been exactly the same. "Vegas" was just an excuse to copy CSI.