Easily underrated.
Yeah, the Wodi seem fly by night as a come and go one-off or even filler. A filler species with great tailors whose outfits would be given justice if remastered in HD. But I wanted to know more about them, especially this amazing game that puts people into the ultimate VR on the inside, with outside players controlling their fates with those on the inside not realizing it. That's a bit creepy and I don't recall anything like this having been done before, so it is original.
The ending "it was just a game" being told so nonchalantly is fantastic and just as original.
And it's a great Quark episode for sure, which is why I want to know more about the Wodi, since their game seems to come up at the most perfect time - after Quark's antics. (Maybe the Prophets sent them.) And maybe that's why some people see the episode so highly, taking one subplot (even if it's more a piggyback than a sideplot) and crowning it the best-ever thing.
And as far as filler episodes go, if this is a filler then give me more fillers because real fillers offer or say nothing, "Move Along Home" provides far more than nothing.
And, as said above, there is a TOS-style feel - but at the same time I couldn't see TOS actually doing this episode.
It's a good story, but even with their hiccups the first three DS9 stories are stronger and more tightly written stories.