Hell i’d read an article analyzing exactly what role they played in the biospheres ecosystem.

The article implies they’re bad, prima facie. If you want to be “scientific” then lets address exactly what they were contributing and hurting.

Was biosphere 2 designed to account for an insect food chain? Was it designed to account for all the types of waste cockroaches eat?

The more I think about it the less i feel like the cockroaches were the result of a “failure” and the more I think they're actually the data that should be considered a result of the experiment!