You've got data from good experiments and from sub-standard experiments. I say it does not make sense to mix the data from teh bad experiments in with the good, it can only deteriorate the quality of the mixture.
Do you think this argument is unreasonable
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No, I don't.
But, From the abstract:
"Ratings of all 40 studies by 3 independent raters reveal that the effect size achieved by a replication is significantly correlated with the degree to which it adhered to the standard ganzfeld protocol. Standard replications yield significant effect sizes comparable with those obtained in the past. "
Even regardless of meta-analysis, the experimental effects are there, and positive. And I haven't seen any reasonable explanation otherwise. (see the posted thread)