I have to admit: Eerie, Indiana, The Other Dimension did better than I expected. But the series lacked the seriousness of the other show. More than anything, the adventures of Mitchell and Stanley seemed purely for the chance to do continuous gags, than an actual plot. And the kids just weren't as believable - they unfortunately did not have the grasp of their characters that Omri Katz and Justin Shenkarow had.
The show was also rushed out at a time when FOX already had at least one show of this nature. Two at once was pure overload.
I feel I must also mention that the books written for the series at times had more detail and plot than the show itself, another reason to its failure.
It tried. And you had to admire the effort. But the original Eerie, Indiana was creepier, better written, and better acted.