Can I get any decent facts or sources why we should raise animals for meat in the first place? I'm sincerely interested in the topic! You can never get 1:1 ratio when feeding crops etc. to animals. It's always more efficient, when thinking of energy, to consume those plants by yourself. Of course, there should be overseeing of balanced diet - but that should be watched even when animals are used to ensure that people don't get extra problems from meat and dairy consuming.
Crickets would need total change of our attitudes towards them, at least if Western people are considered. Though they are high in efficiency. Soy should be monitored: I suppose GMO's ain't that good idea to carry on in space without really high class testing and monitoring. Seeds and nuts and other plants seem to be considered quite a safe possibility.