A show could still be good even with ass special effects.
And anyway, if they were banking on it being a big thing to cash into The Avengers, WB might pump some real money into it.
I'd be all for a JLA TV show, or separate live action JLA member TV shows that tie into each other, as long as they had a good show runner. Someone who cares about making quality entertainment, who both loves shlock and taking shlocky things very seriously and treating them with respect, and knows comics.
Which basically describes Joss Whedon, but you get my point.
If you had, like, Marti Noxon, maybe paired with someone like Ronald D. Moore, as show runner, I'd probably watch it.